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AIX as a porting platform
Building applications on a secondary platform is perhaps the simplest
definition of a porting platform. This article explores the porting aspects in
the context of AIX.
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Articles |
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24 Nov 2009 |
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RPC programming
Using RPC programming is one of the most powerful and efficient ways to
ensure communication between client and server entities. It forms the basis
for almost any application running on distributed computing environments. This
article deals with the basic flow of events between an RPC client and server
and later deals with runtime handling of these events. The different routines
that are dealt in this article are categorized appropriately and described
based on their functionality.
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Articles |
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24 Nov 2009 |
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AIX tips for RHEL4 administrators
Are you broadening your skills as a Linux systems administrator into various flavors of
UNIX? Have you found yourself in charge of IBM UNIX servers on short notice? Get a rundown
of the differences and similarities between Red Hat Enterprise Linux and IBM AIX so that
you can perform day-to-day activities with ease.
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Articles |
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17 Nov 2009 |
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Using alt_disk_copy
The alt_disk_copy is a built-in AIX utility that allows the cloning of a
running rootvg. alt_disk_copy is typically used for upgrades that effect the running
of AIX, cloning of disks for migration, and online backups of rootvg.
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Articles |
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10 Nov 2009 |
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Speaking UNIX: Peering into pipes
The pipe operator connects one UNIX command to another to create ad hoc programs
right on the command line. But a pipe is something of a black box, occluding the data
flowing from one utility to the next. Pipe Viewer provides a peek into the pipeline. Here's
how to use it in day-to-day tasks.
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Articles |
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03 Nov 2009 |
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Managing Storage Subsystems using IBM Systems Director V6.1.2
IBM Systems Director V6.1.2 is a tool that aids in the management of various devices such as servers, switches, and storage subsystems. This article addresses the nuances of managing the Storage Subsystem using the IBM Systems Director. IBM Systems Director uses the concept of a proxy provider that acts like an intermediate agent between the IBM Systems Director and Storage Subsystems. For DS3000 and DS4000 series Storage Subsystems, IBM Systems Director uses the LSI Storage Management Initiative–Specification (SMI-S) provider.
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Articles |
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03 Nov 2009 |
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Resolving problems unmounting partitions
To cleanly shut down or hot swap storage hardware on a UNIX
or UNIX-like system, you must be able to unmount any file system that
uses storage on that device. However, you can't unmount a file system
if files or directories in that file system are in use. The lsof and
fuser commands can help you identify and terminate the processes
that are using files on or executing from the storage devices that
your system is using. Using these commands simplifies the
traditional detective work associated with finding the processes
that are preventing you from unmounting storage devices, decreasing
frustration, and helping you proceed with critical system
administration tasks.
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Articles |
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27 Oct 2009 |
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A quick guide to migrating to IBM Systems Director V6.1
IBM Systems Director Server V6.1 includes migration tools that remove the
complexity of migrating from the previous version of IBM Systems Director Server
to Version 6.1. This overview of the migration process will prepare the
user for what needs to be done and what to expect so that the
migration can be as quick and easy as possible.
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Articles |
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27 Oct 2009 |
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Configuring an AIX client with multiple Kerberos realms
A typical customer environment is heterogeneous and includes AIX, Windows,
and Linux, which can
be servers or clients. In many situations, an AIX Kerberos client needs to interact with
multiple Kerberos realms hosted on a Windows or AIX Kerberos
server to handle the requested services. This article explains the configuration details
required to set the AIX Kerberos client to interact with
multiple realms hosted on Windows Kerberos servers.
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Articles |
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20 Oct 2009 |
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Securing remote AIX V6.1 data at rest using the SLES Encrypt File Container
See how you can secure data at rest exported by AIX and consumed by SUSE Linux
Enterprise Server via
the NFS protocol using the Encrypt File Container feature provided with SLES.
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Articles |
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13 Oct 2009 |
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Learning interprocess communication with the ACE Framework
For most programmers, interprocess communication (IPC) is synonymous with using the Socket API.
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Articles |
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13 Oct 2009 |
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DB2 pureScale
DB2 pureScale reduces the risk and cost of business growth by providing unlimited capacity, continuous availability, and
application transparency. DB2 pureScale on IBM Power Systems incorporates PowerHA pureScale technology to deliver levels of
database scalability and availability unmatched on UNIX or x86 systems. This complements DB2 for z/OS and System z, the undisputed
leader in total system availability, scalability, security and reliability.
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08 Oct 2009 |
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Cloud computing with Linux and Apache Hadoop
Many companies like IBM, Google, VMWare, and Amazon have provided products and
strategies for Cloud computing. This article shows you how to use Apache Hadoop to
build a MapReduce framework to make a Hadoop Cluster and how to create a sample
MapReduce application which runs on Hadoop. You will also learn how to set up a
time/disk-consuming task on the cloud.
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Articles |
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06 Oct 2009 |
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Make sudo work harder
The sudo utility allows users to run commands as another, or privileged, user. Sudo has
features not often used by administrators. This article demonstrates
some of these features, such as include files, timeouts, and logical operations.
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Articles |
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06 Oct 2009 |
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IBM and HP virtualization
Learn about the virtualization capabilities of both HP-UX and AIX, the
fundamental differences between virtualization products on HP and IBM, and how these
products integrate with the hardware platforms on which they run. The intent of this article is to educate you and also to help you make informed decisions as to which platform works best for you, from a feature and functionality standpoint and for your long-term strategic goals.
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Articles |
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29 Sep 2009 |
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Configure single sign-on authentication on AIX
Single sign-on (SSO) is a mechanism that allows a user to access resources
across multiple systems by just authenticating to the server once. This method is
quite helpful in scenarios where the user database is centralized (like LDAP). Users
can authenticate on one system and then access multiple systems.
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Articles |
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22 Sep 2009 |
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Speaking UNIX: Advanced applications of rsync
Keeping multiple machines synced can be challenging. Fortunately, a
powerful tool is available to make the task easier: rsync.
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Articles |
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22 Sep 2009 |
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AIX user and group administration
Dive into the configuration files behind users and groups in IBM
AIX, as well
as command-line tools designed to help manage the users and groups easily.
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Articles |
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15 Sep 2009 |
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Simplify AIX image management in a PowerVM environment using IBM Systems
Director VMControl V2.1
The lifecycle management, provisioning, and configuration of virtual
appliances (images) are very time-consuming but important tasks for virtual system
management, especially in a PowerVM environment. This article introduces a new
product, IBM Systems Director VMControl V2.1, which is designed to simplify the
management of virtual environments across multiple virtualization technologies and
physical platforms. It can visualize, navigate, manage, and deploy images from a
centralized location. Explore the key functions of this product and learn how to
manage AIX images in a PowerVM environment.
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Articles |
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15 Sep 2009 |
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UNIX network performance analysis
Knowing your UNIX network layout will go a long way with understanding your
network and how it operates. But what happens when the performance of your UNIX
network and the speed at which you can transfer files or connect to services suddenly reduces? How do you diagnose the issues and work out where in your network the problems lie? This article looks at some quick methods for finding and identifying performance issues and the steps to start resolving them.
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Articles |
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08 Sep 2009 |
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IBM Network Authentication Service Version 1.4.0.8 for AIX 6.1
IBM Network Authentication Service Version 1.4.0.8 was released with the AIX
6.1 expansion pack CD and is also available on the IBM AIX Web Download Pack
Program. The new version has some good reasons, including new features and vital
fixes, for AIX Kerberos administrators to
upgrade. This article describes the features issued in this release and how these
features can benefit your Kerberos infrastructure over AIX and help enhance
security. The new release allows administrators to "ride up the grade," not simply upgrade.
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Articles |
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08 Sep 2009 |
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AIX higher availability using SAN services
Learn the scenarios in which remapping,
copying, and reuse of SAN disks is allowed and supported. More easily switch
AIX environments from one system to another and help achieve higher
availability and reduced down time. These scenarios also allow for fast deployment of new systems using cloning.
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Articles |
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01 Sep 2009 |
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High scalability and availability of AIX secldapclntd using the Tivoli Directory
Server proxy
The secldapclntd daemon provides and manages connection between the AIX
security LDAP load module of the local host and an LDAP server, and handles
transactions from the LDAP load module to the LDAP server. Simple configuration
steps do not allow us to specify highly available and scalable LDAP servers at the
back end. This article lists the steps to configure a highly available and
scalable back-end LDAP for the secldapclntd daemon using the Tivoli Directory
Server proxy.
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Articles |
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01 Sep 2009 |
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Resource controls in workload partitions
Resource control in workload partitions is based on the Workload Manager (WLM) technology that has
been available in the AIX kernel since IBM AIX V4.3.3. The workload partition (WPAR)
resource control encapsulates and extends the WLM technology. It presents a layer of abstraction above WLM, making it easier to administer resource control without having a need to possess an in-depth knowledge of WLM.
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Articles |
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25 Aug 2009 |
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Monitoring logs and command output
Monitoring system logs or the status of a command that produces
file or directory output are common tasks for systems
administrators. Two popular open source tools simplify these
activities for modern systems administrators: the multitail and watch
commands. Both are terminal-oriented commands, which means
that they are easily ported to most UNIX or UNIX-like systems
because they do not depend on any specific graphical desktop
environment.
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Articles |
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25 Aug 2009 |
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Forums and community
Get involved in the AIX(R) and UNIX(R) community by participating in the
developerWorks blogs and forums.
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20 Aug 2009 |
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Growing green with virtualization: Virtualization as the backbone of green IT
Focus on virtualization as an excellent vehicle to address business needs while
you control the ever growing challenges of IT costs and data center sprawl in this
initial article of a series. For large and small businesses to remain viable in the ever evolving technology arena, companies need to adopt a strategy that works for them.
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Articles |
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18 Aug 2009 |
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Making software testing greener
Recently there has been an increased emphasis on the effective utilization of
resources. Testing plays a key role in any software development lifecycle. Hence,
effective utilization of resources in testing becomes the prerogative for any product
team. Read about the effective utilization of resources available for testing on both
hardware and software, thus leading to more efficient testing.
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Articles |
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11 Aug 2009 |
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Configuring Active Memory Sharing from a customer's experience
Share the experience of being part of IBM's Early Ship Program for Active Memory
Sharing on POWER6. See how AMS was configured and deployed in a customer's non-production AIX lab environment.
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Articles |
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04 Aug 2009 |
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Speaking UNIX: Man oh man
UNIX has hundreds if not thousands of commands, and it's impossible to
remember every option and nuance. But, happily, you don't have to: man, UNIX's built-in,
online reference system, is man's best friend.
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Articles |
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28 Jul 2009 |
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A memory-related issue unfolded using performance tools for AIX
Performance metrics of a system are based purely on what is expected from it and
to what extent a computer system stands up to those expectations. The case study
presented in this article is intended to discuss a memory-related
issue faced by one of the customers and the steps followed to pin down the root cause of the problem.
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Articles |
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28 Jul 2009 |
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Dynamic tracing facility
Problem determinations of the failures that occur in production environment pose a
difficult challenge because of the complex environment and numerous different software
stacks that interact with each other.This article provides a brief
introduction to the Solaris dynamic trace facility and the ProbeVue facility on AIX and illustrates its use with examples.
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Articles |
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21 Jul 2009 |
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Efficient I/O event polling through the pollset interface on AIX
This article explains how you can improve the performance of Java
applications with intensive asynchronous I/O operations running on AIX platforms
by using a pollset interface, which eliminates redundant copy operations of file descriptors between user and kernel spaces and improves the scalability and the polling time performance with a poll cache.
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Articles |
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21 Jul 2009 |
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Avoid common errors in UNIX and Linux
Discover the most common errors in UNIX and Linux -- and
how to avoid them.
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Articles |
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14 Jul 2009 |
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JS22 Live Partition Mobility
This article focuses on performing Live Partition Mobility between two JS22
Blades. It provides insight into what to expect before, during, and after a live
migration in a real-world environment with SAP and Oracle on AIX.
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Articles |
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14 Jul 2009 |
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Understanding advanced AIX features: MLS in simple steps
If you feel that the new features of AIX like RBAC and MLS are too
confusing, this article will help you to understand the features in simple terms and
with examples. This article is part two of a series.
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Articles |
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07 Jul 2009 |
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AIX A-Z: Learning AIX's spooler back-end programs
While most IBM AIX administrators know how to set up print queues and manage
printing through the System Management Interface Tool (SMIT) or the general print
commands, there's more to printing on the UNIX system. If you want to learn more than just how to set up or manage virtual printers on AIX, this article is for you. Most successful AIX and UNIX administrators thrive on learning more about the system they administer. Printing is only one facet of their system, but it's an important one to know.
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Articles |
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07 Jul 2009 |
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Producing documentation and reusing information in XML, Part 1: Document publishing using XML
XML provides a way to identify data items and subcomponents within any structured data set, but has its roots in documentation development and production. Robust, open standards for XML document markup and a rich set of freely available tools for XML document parsing and format conversion make it easy to install and configure a complete documentation development and formatting environment on any UNIX or Linux system.
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Articles |
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07 Jul 2009 |
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High-performance concurrent communication development in UNIX using the ACE library framework
The ACE open source toolkit helps developers create robust, portable multithreading
applications. Take a peek into some of the ways you can create applications that use
ACE threads.
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Articles |
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30 Jun 2009 |
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Understanding advanced AIX features: Role-based access control in simple steps
Security is a major concern of operating systems. This article series provides an understanding
of the new features on AIX, role-based access control and multi-level
security. Part 1 of this series discusses AIX
role-based access control (RBAC) and how roles, responsibilities, and the authorization of
a root user can be delegated to more than one user.
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Articles |
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23 Jun 2009 |
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Python testing frameworks: Selecting and running tests
The recent emergence of industrial-strength Python testing frameworks
means that Python tests are being written more succinctly,
more uniformly, and with better reporting of results than ever before.
This article examines how the three most popular testing frameworks
identify and gather tests,
and what support they provide for writing entire layers of tests
that share common setup and teardown code.
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Articles |
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23 Jun 2009 |
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Avoiding the gotchas of AIX LPAR migrations
Learn how to identify and get past the common roadblocks that can interfere
with migrating IBM AIX servers to the latest in logical partition (LPAR)
technology.
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Articles |
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16 Jun 2009 |
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Upgrading from POWER5 to POWER6
Read about and learn from my experiences in upgrading a POWER5 595 to a new POWER6 595.
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Articles |
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09 Jun 2009 |
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Working with filesystems using NFSV4 ACLs
Managing NFSv4 ACLs on different filesystem with different commands can
become difficult. This article discusses and compares the different commands that you
might use to migrate from one filesystem to another.
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Articles |
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02 Jun 2009 |
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Python testing frameworks: Finding modules to test
The recent emergence of industrial-strength Python testing frameworks
means that Python tests are being written more succinctly,
more uniformly, and with better reporting of results than ever before.
Here we look at how the leading testing frameworks
provide robust auto-discovery of your application tests,
and how this replaces the fragile central lists of tests
that you used to maintain.
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Articles |
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02 Jun 2009 |
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AIX 6.1, Solaris 10, and HP-UX and the System p
In recent years, HP, Sun, and IBM have all released new versions of their
commercial UNIX-based operating systems. This article compares and contrasts some of
the innovations in their releases. Learn the differences on how to work with certain
tasks, such as networking and performance tuning. Also, see at a high level some of the virtualization differences among these big three.
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Articles |
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26 May 2009 |
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Speaking UNIX: 10 great tools for any UNIX system
The universe of UNIX tools changes constantly. Here are 10 tools -- some
you may have overlooked and some new -- to tinker with.
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Articles |
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12 May 2009 |
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| |
Python testing frameworks: Make your life easy with a Python testing framework
The recent emergence of industrial-strength Python testing frameworks
means that Python tests are being written more succinctly,
more uniformly, and with better reporting of results than ever before.
This article begins to explore this new world
by introducing the leading testing frameworks
and looking at their most basic features.
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Articles |
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05 May 2009 |
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UNIX network analysis
You can find out a lot about your network by using a variety of different
tools. If you want to understand the layout of your network, where packets are going, and what people are doing, then you need to use a variety of different tools that can help you to build up a picture of your network and what is going on. This tutorial examines techniques for
monitoring the traffic and content of your UNIX network and how to read and
diagnose problems on your network.
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Tutorial |
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05 May 2009 |
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Automating deployment and activation of virtual appliances for IBM AIX and Power Systems
Server virtualization enables you to rapidly provision new environments by
using libraries of virtual image templates, or virtual appliances. Automated
provisioning requires the management of operating system, network, and
application-specific customization. This article provides a sample framework for
automating virtual image deployment and activation on Power Systems, with a
downloadable example that demonstrates how to provision a virtual appliance made up
of IBM WebSphere Application Server V7.0 running on AIX V5.3.
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Articles |
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29 Apr 2009 |
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Advanced performance tuning concepts
The performance of even the best application suffers if the underlying host is not configured properly. This article looks at the four key areas of performance tuning and identifies what to watch for in each of them. In addition, Java-based applications bring other performance tuning requirements with them, especially the
garbage collection cycle. This article also looks at what you need to know about garbage collection.
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Articles |
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28 Apr 2009 |
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AIX job spooler
Job spooling or spooled processing are mainframe concepts that are available in the IBM AIX environment, but are rarely implemented. This article describes the configuration, reasons, and purposes for implementing job spooling in AIX environments.
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Articles |
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28 Apr 2009 |
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Thanks for the memory
Running out of Java heap isn't the only cause of a java.lang.OutOfMemoryError. If native memory runs out, OutOfMemoryErrors that your normal debugging techniques won't be able
to solve can occur. This article explains what native memory is, how the Java runtime
uses it, what running out of it looks like, and how to debug a native OutOfMemoryError
on AIX. A companion article covers the same topics for Linux and Windows systems.
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Articles |
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21 Apr 2009 |
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Green computing on AIX and POWER
This article introduces green computing as it relates to POWER systems and
AIX. It discusses how server consolidation around AIX and POWER servers work in
tandem with green computing. It discusses the datacenter and how POWER servers
exemplify the concepts of green computing by lowering power and cooling costs. It
also discusses recent innovations in the POWER6 architecture that lend themselves
to green computing, such as live partition mobility and other related
feature/functionality innovations. Finally, the article discusses recent
improvements in AIX 6.1, such as WPAR and live application mobility, and shows why these are tailor-made for green computing.
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Articles |
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21 Apr 2009 |
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Configuring Kerberos master-slave KDC with LDAP master-replica topology on AIX
Learn how to configure and manage the Kerberos master-slave Key Distribution Center with an LDAP master-replica setup. This article gives a step-by-step example of how to achieve one such complex Kerberos setup.
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Articles |
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21 Apr 2009 |
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The rsync family
Synchronizing two machines (such as a laptop and a desktop computer) is
easier and faster when you use rsync, which boasts an efficient
algorithm and options for just about everything you might need. And if a command-line
operation isn't your thing, several graphic tools make using rsync
easier still.
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Articles |
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14 Apr 2009 |
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| |
Secure file transfer in a heterogeneous environment
File transfer is an essential and important activity in the day-to-day
computing world. Security lapses during file transfer can invite leak important data
to the external world. As a result, securing FTP is of primary importance. Hence, in
AIX V6.1, IBM has introduced a secure flavor of FTP (and ftpd), based on OpenSSL,
using Transport Layer Security (TLS) to encrypt both the command and the data
channels of file transfer. This article shows the advantage of using this AIX V6.1
feature and its usage between AIX and other heterogeneous systems that already
support this feature. This article focuses on AIX secure FTP with a Windows server.
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Articles |
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14 Apr 2009 |
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| |
Cloud computing on AIX and System p
What is cloud computing and how is it relevant to POWER systems and your
organization? Learn guidelines around cloud computing and Power systems.
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Articles |
|
07 Apr 2009 |
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| |
Introduction to distributed version control systems
Interested in distributed version control but intimidated by all the jargon?
This article provides an introduction to the three main systems available (Git,
Mercurial, and Bazaar),
discusses some of the advantages to be had from adopting a distributed workflow,
and provides a
reference guide comparing common operations with subversion.
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Articles |
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07 Apr 2009 |
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| |
Port Fortran applications
Discover how to port Fortran-based High Performance Computing applications, such as computational fluid dynamic (CFD) modeling, weather modeling, and linear algebra packages, using IBM XL compilers and gnu compilers on large clusters. The solutions in this article are equally applicable in all types of porting work in Fortran or any UNIX(R)- or Linux-based systems. Though C/C++ and other programming languages are popular, with strong features and widespread use, Fortran is still the favorite for the scientific and engineering community because of its performance.
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Articles |
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01 Apr 2009 |
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| |
Solutions for tracing UNIX applications
If you are developing a UNIX application, then you can trace and debug the
running application and extract the information you need from it. But what if you
want to know what is going on inside a UNIX application and you don't have access to the source code? This tutorial looks at some systems that enable you to trace the execution of applications and work out what they are doing without having to make any modifications to the source code, and even without having to stop and restart the application.
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Tutorial |
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31 Mar 2009 |
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| |
Multiprocessing with Python
Learn to scale your Unix Python applications to multiple cores by using the multiprocessing module which is built into Python 2.6.
Multiprocessing mimics parts of the threading API in Python to give the developer a high level of control over flocks of processes, but
also incorporates many additional features unique to processes.
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Articles |
|
24 Mar 2009 |
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| |
Speaking UNIX: The Squirrel portable shell and scripting language
If you don't want to commit to the idiosyncrasies of a specific shell running on a particular
platform, try the Squirrel Shell. The Squirrel Shell provides an advanced, object-oriented
scripting language that works equally well on UNIX, Linux, Mac OS X, and Windows systems.
Write a script once, and run it anywhere.
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Articles |
|
17 Mar 2009 |
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| |
10 tips for sensible systems administration
Benjamin Franklin: scientist, scholar, statesman, and . . . systems administrator?
Yes, 200 years or so before the birth of UNIX, Franklin scribed sage advice to keep
systems humming. Here are 10 of Franklin's more notable tips.
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Articles |
|
10 Mar 2009 |
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| |
Multi-security mechanisms with multifactor authentications
Authentication is a key component of security-based solutions. This article
discusses the risk associated with the use of the same security mechanisms in
multifactor authentication systems and the use of GSS-API as a suitable option for achieving the multi-security mechanism with multifactor authentication for enhanced security for solutions designed over UNIX.
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Articles |
|
10 Mar 2009 |
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| |
10 steps to UNIX nirvana
Discover several time-saving tips and freely available tools that both new
and experienced C++ developers can use.
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Articles |
|
03 Mar 2009 |
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| |
Configure Enterprise Identity Mapping (EIM) for AIX NFSv4 over a Kerberos
cross-realm setup
Learn how to set up and configure Enterprise Identity Mapping (EIM) for AIX
Network File System (NFS) version 4 over a Kerberos cross-realm setup.
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Articles |
|
03 Mar 2009 |
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| |
Manage blogs on AIX
AIX provides an ideal environment for blogs and for the Web Content
Management System (CMS) tools running those blogs because of its Web and
text-processing power. You get the best of both worlds by combining open source
CMS and AIX for a complete and ready-to-use content management tool with extensive
support from the open source community, along with a secure and reliable server
with high availability, scalability, and enterprise-level support from IBM. This
article introduces some of the best CMS solutions for AIX available from the open
source community, and helps readers understand the important differences among
them. The article also provides a guideline for system architects and developers to help them choose the CMS that best fits their needs.
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Articles |
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24 Feb 2009 |
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| |
Host-based and PAM authentication methods
This article describes some authentication methods supported by
OpenSSH. OpenSSH is a free tool that implements the SSH1 and SSH2 protocols.
Understand the configuration of some of the authentication methods in OpenSSH as
well as new features added in the IBM-supported version of OpenSSH.
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Articles |
|
24 Feb 2009 |
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| |
Configure IBM Network Authentication Service master KDC with an LDAP back-end server on AIX
Learn how to configure the IBM Network Authentication Service (IBM Kerberos) with
an
LDAP (Lightweight Directory Access Protocol) directory to store Kerberos principal
and policy information. This article is a detailed guide for Kerberos
administrators who want to achieve security, scalability, and high availability using Kerberos and LDAP on AIX.
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Articles |
|
17 Feb 2009 |
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| |
Setting up UNIX file systems
Learn how you can improve your computer's performance and help protect it
from harm by setting up your file systems in an optimal manner.
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Articles |
|
17 Feb 2009 |
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| |
Perform uniform mounting with generic NFS
To efficiently achieve uniform mounting in the presence of multiple,
simultaneous NFS version exports, you need a generic NFS mount utility. Learn
how a generic NFS mount utility
can help reduce handling multiple NFS versions and simplify the management of
those versions. The article
describes the concept of the generic NFS mount, outlines the advantages and
applications of the system, and gives some overall design
details.
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Articles |
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11 Feb 2009 |
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Speaking UNIX: Stayin' alive with Screen
The command line is a powerful tool, but it has a fatal weakness: If the shell
perishes, so does your work. To keep your shell and your work alive -- even across
multiple sessions and dropped connections -- use GNU Screen, a windowing system
for your console.
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Articles |
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10 Feb 2009 |
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Configuration and usage of rquota daemon in NFS on AIX
This article explains how to set up rquota daemon in the Network File System
(NFS)
environment on AIX machines. The article also provides side-by-side hints to
Linux users on how to configure rquota daemon on Linux boxes.
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Articles |
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10 Feb 2009 |
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Synchronizing UNIX files
There are many tools available that allow you to synchronize files across UNIX
directories, but doing it effectively, and securely, takes a little bit more effort.
This article looks at solutions for synchronizing files across UNIX filesystems and different computer systems securely, and at solutions that allow you to synchronize encrypted versions of your files for the purposes of backup.
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Articles |
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03 Feb 2009 |
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Performance Monitor Counter data analysis using Counter Analyzer
To understand what happens inside a processor when an application
is executed, processor architects designed a set of special registers to
count the events taking place when processors are executing instructions.
These registers, called the Performance Monitor Counter, provide interesting information
about the processor, such as how many I-cache misses
take place, how many instructions are completed, and more. Counter Analyzer
is one plugin of the Visual Performance Analyzer, an Eclipse-based performance
analysis tool. It can analyze raw events, metrics, and CPI breakdown model,
and help you better understand these events.
This article introduces the Performance Monitor Counter and its related tools briefly,
and then shows
you how to use these tools and the Counter Analyzer together, using the Caesar
cipher tool as example.
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Articles |
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03 Feb 2009 |
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Performance tuning considerations in your application server environment
Understand how the various components of a Web application interact, and where you might find performance bottlenecks. Both developers and administrators will benefit from knowing this because performance is everyone's responsibility.
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Articles |
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27 Jan 2009 |
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Enterprise-Wide Unique identifiers
Successful implementation of business continuity in large IBM AIX environments
is dependent upon the elimination of resource conflicts on the supporting computer
systems. Many aspects of business continuity -- such as virtualization, high
availability, and disaster recovery -- require unique identification values for many
of the resource parameters involved in system configuration. Provided in this article
is a discussion and mechanism for generating Enterprise-Wide Unique (EWU) identification values for a wide variety of configuration parameters.
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Articles |
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27 Jan 2009 |
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IBM Network Authentication Service KDC configuration, Part 3: Configuring a slave KDC with LDAP on AIX
The first two parts of this three-part series covered how to configure IBM
Network Authentication Service (NAS) master and slave KDCs with a legacy database and how to upgrade the slave KDC to
behave as a master KDC. Taking this to the next level, this article shows how to configure the Kerberos slave KDC with the LDAP database and why there is a need to do so.
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Articles |
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20 Jan 2009 |
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Optimizing N-tier J2EE applications on UNIX operating systems
Multi-tier Web applications provide a more flexible and scalable environment for
business-critical applications and their 24 x 7 availability requirements. Today's
increasingly sophisticated deployments introduce additional complexity in system,
infrastructure, and application interaction. Operating system and hardware selection,
best practices for application design and coding, and performance and application
monitoring can help maximize application performance today and scalability for
tomorrow.
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Articles |
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20 Jan 2009 |
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Kerberos LDAP master-slave configuration management
Kerberos and LDAP are designed to allow for a master/slave setup.
In a centralized environment, user and group management can be handled through the LDAP/KRB5LDAP (Kerberos LDAP) protocol. This article explains how to configure KRB5LDAP (Kerberos LDAP) master/slave for KRB5LDAP clients.
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Articles |
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13 Jan 2009 |
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Create a WebSphere Application Server 7.0 virtual appliance for AIX
This article describes a process for creating and using a WebSphere Application
Server (Application Server) virtual appliance for AIX logical partition (LPAR)
virtualization technology. It describes a source LPAR environment for building a
Application Server virtual appliance and specifying the steps involved in preparation
of the environment, including installation of Application Server and custom
configuration needed to ensure that the installed version of Application Server can
function as an appliance. To create the appliance, the prepared environment is used as
a source for an image, saved as a binary file and is described using an Open Virtual
Machine Format (OVF) file. The article concludes with a description of alternative scenarios for sharing the appliance, including one where the appliance is shared across the Internet and another where the appliance is shared within a data center.
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Articles |
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13 Jan 2009 |
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Installing technology levels and service packs for AIX
One of the critical questions AIX systems administrators have to deal with
is when to upgrade their systems. This article looks at some of the issues
surrounding upgrades such as when and how systems administrators should deploy
upgrades as well as methods for retrieving and performing updates. Learn some of the recent changes and best practices regarding the deployment of technology levels and service packs for AIX.
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Articles |
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06 Jan 2009 |
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Auditing and serviceability management in IBM Network Authentication Service for AIX
Auditing is a vital aspect of any software, and even so more if
the software provides security services. This article helps to understand the auditing and serviceability features provided in IBM Network Authentication Service.
Learn about the different server-side log files, how to enable them, and how to analyze them.
Also gain the expertise on how to turn on the debug message logging required for problem determination
and support activities.
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Articles |
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06 Jan 2009 |
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Make a product-specific debugger in AIX
This article discusses the requirements needed to make a product-specific
debugger for support products. The product-specific debugger helps in
customizing the data you might want to dig, analyze, and debug.
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Articles |
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23 Dec 2008 |
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Install and configure WebSphere Application Server on UNIX and
Linux systems
Learn how application servers are used in modern enterprise
environments and how to install IBM WebSphere Application
Server on UNIX and Linux systems to provide the cornerstone of a
robust, well-supported enterprise Web environment. This tutorial
also explains how to integrate WebSphere Application
Server into the startup and shutdown processes on your UNIX and
Linux servers and provides links to many other resources that will
help you get up and running quickly with WebSphere Application
Server.
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Tutorials |
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22 Dec 2008 |
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| |
Speaking UNIX: Opening Windows with Cygwin
Cygwin is a UNIX-like environment for the Microsoft Windows operating
system. It includes a real UNIX shell, a Portable Operating System Interface (POSIX) emulation
library, and thousands of UNIX utilities ported to Windows.
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Articles |
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16 Dec 2008 |
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From parallel SCSI to serial SCSI
SCSI (Small Computer System Interface), often called Parallel SCSI, is almost 30
years old and can hardly keep up with the demands of todayâs IT environment. Serial Attached SCSI (SAS) was developed to address the limitations inherent in SCSI. This article highlights the differences between these two interfaces and points out the attributes that account for the increasing popularity of SAS.
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Articles |
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16 Dec 2008 |
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Using AIX Security Expert
AIXPert is an all-purpose GUI and command-line security tool that
incorporates over 300 security configuration settings. Learn about recent
enhancements implemented with AIX V6.1, including SOX auditing support, and go
through real scenarios to show how AIXPert can be used from the command line, smit, and the GUI.
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Articles |
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09 Dec 2008 |
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Ruby for systems administrators
Apart from its use as a powerful Web application development platform, in
combination with the Rails framework Ruby has another less-heralded side of itself,
which is as a powerful scripting language, such as Python or Perl. It has immense
capabilities, owing to the availability of many built-in and external libraries, the
power of which can be harnessed to solve a great deal of the scripting needs that come
up in any typical systems administrative work environment. Also, it's fun to program in Ruby!
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Articles |
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09 Dec 2008 |
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Resources on the IBM Network Authentication Service and related technologies for AIX
Get the answers to your questions about the AIX Network Authentication Service and
related technologies in one place. This article provides developers and
administrators with a listing of the developerWorks articles that cover
configuration, administration, interoperability, Kerberized filesystems (NFS V4), and
different Kerberized login modules based on IBM NAS for AIX. For your convenience and
ease of usage, the articles have be categorized into appropriate sections.
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Articles |
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03 Dec 2008 |
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| |
Speaking UNIX: Go fish!
The Friendly Interactive Shell, or fish, is a joy to use. Its syntax,
context-sensitive help, and color-coded command-line interface (CLI) greatly simplify the
use of UNIX and ease the burdens of scripting.
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Articles |
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25 Nov 2008 |
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Samba on AIX
Samba is an open source, free software suite that provides seamless file and
print services between Windows clients and UNIX-like platforms. It can be run on a
UNIX-like platform like AIX, BSD UNIX, Linux, IBM 390 and OpenVMS. Samba uses the TCP/IP protocol that is installed in the host server. When configured, this server software allows the host machine to share files and printers and make them accessible from Windows clients.
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Articles |
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25 Nov 2008 |
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Naming standards for business continuity
In today's partitioned and virtualized computing environments, the requirement
for naming standards is more apparent than ever before. Unfortunately, there is a
widespread lack of understanding between the different categories of names used to identify managed systems, LPAR's, profiles, node names, host names, and aliases. This article defines naming categories and provide standards for creating enterprise-wide unique names associated with each category. This article also explains why it is important to distinguish between the different naming categories and how they are an integral part of data center automation projects and an overall business continuity plan.
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Articles |
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25 Nov 2008 |
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Comparison of SLES (SUSE) and RHEL (Red Hat) on IBM System p
Most system administrators planning to install Linux on IBM System p
eventually run into an important question: Which Linux distribution should I
install? This article compares two distributions from Red Hat and Novell, and
weighs the pros and cons of each. We'll discuss Linux on POWER (LoP), the history of
both distributions, the relationship IBM has with them, and the factors that should
go into your decision-making process. We're also going to compare and contrast what
it takes to create logical volumes on SuSE Linux Enterprise Server (SLES) and Red
Hat Enterprise Linux (RHEL).
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Articles |
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18 Nov 2008 |
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Comparison of SLES (SUSE) and RHEL (Red Hat) on IBM System p
Most systems administrators planning to install Linux on IBM System p
eventually run into an important dillemma: Which Linux distribution should I
install? This article compares two distributions from Red Hat and Novell, and
weighing the pros and cons of each. We'll discuss Linux on POWER (LoP), the history of
both distributions, the relationship IBM has with them, and the factors that should
go into your decision-making process. We also compare and contrast what
it takes to create logical volumes on SuSE Linux Enterprise Server (SLES) and Red
Hat Enterprise Linux (RHEL).
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Articles |
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18 Nov 2008 |
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IBM Network Authentication Service KDC configuration, Part
2: Upgrading a slave KDC to a master KDC
Become an expert administrator of a reliable Kerberos environment with high
availability, involving multiple Kerberos master-slave Key Distribution
Centers (KDC) on AIX and many clients. Part 2 of this series covers how to
upgrade the slave KDC to perform as a master KDC. Part 1 covered how to
configure and manage the basic master-slave KDC setup, and Part 3 will show
how to configure the slave KDC with LDAP as the back end for storing
Kerberos data.
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Articles |
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11 Nov 2008 |
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| |
Distributed compilation
Learn about open source tool options that can help
speed up your build process by distributing the process across
multiple machines in a local area network.
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Articles |
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11 Nov 2008 |
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Automating Linux cloud installations
A simplified process for installing operating systems can reduce the
amount of time you spend on administration of your cloud computing
environment. This article describes how you can automate the installation of
SUSE Linux on a new IBM Power System or System p LPAR. You can also use the
same techniques to install Red Hat Linux or AIX.
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Articles |
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11 Nov 2008 |
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| |
SSL configuration for IBM Tivoli Directory Server 6.0
Gain an overview of SSL configuration for IBM Tivoli Directory Server 6.0 on the AIX 5L operating
system. Learn about command line configuration steps for SSL key database creation,
certificate creation, certificate extraction, SSL authentication mechanisms, troubleshooting for SSL issues, and steps to perform LDAP client-server communication.
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Articles |
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06 Nov 2008 |
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Implement two-factor authentication for AIX using Kerberos
In the ever-growing need for higher security systems, multi-factor
authentication is preferred for network security. Since Kerberos is one of the most
popular network authentication mechanisms, learn how to design a multi-factor
authentication over the Kerberos protocol. Understand the
use of One-Time Password (OTP) and GSS-API to achieve this.
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Articles |
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04 Nov 2008 |
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Install and configure an enterprise-level Web server
Learn how Web servers are used in modern enterprise environments and how to
install and integrate IBM HTTP Server. This tutorial explains why IBM HTTP Server, a
key component of IBM WebSphere Application Server, is also an excellent choice as a
stand-alone Web server because of its standard configuration and seamless upgrade path for
evolving enterprise Web environments.
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Tutorials |
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04 Nov 2008 |
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Python and LDAP
At some point in their careers, most systems administrators need to interact with an LDAP server. This article shows how LDAP
can be used for Apache authentication, as well as how to perform CRUD, or Create, Read, Update, and
Delete operations on an OpenLDAP database, using the Python module python-ldap.
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Articles |
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28 Oct 2008 |
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Enabling DB2 applications for HACMP Smart Assist
HACMP Smart Assist validates the applications before getting them configured. This involves some preparation work for applications that are to be integrated with HACMP. This article documents the steps to enable DB2 applications for HACMP.
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Articles |
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28 Oct 2008 |
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Introducing the Boost parser framework
Learn to use Boost's highly scalable Spirit parser framework, which works on an EBNF specification and can significantly reduce your development time.
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Articles |
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21 Oct 2008 |
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Initial steps on kdb
kdb is a utility that is primarily intended for performing analysis of a
system dump image. This article describes the initial steps for system dump analysis.
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Articles |
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21 Oct 2008 |
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A comparison of virtualization features of HP-UX, Solaris, and AIX
Most IBM AIX administrators understand the virtualization features available to
them on their System p platform through PowerVM, which is also available on the
System p for Linux. But what about the other UNIX hardware platforms? What do
they have to offer and how do some of their features compare to PowerVM? This
article explores all of these topics in detail.
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Articles |
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14 Oct 2008 |
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AIX commands you should not leave home without
Do you wish you could answer some of your own questions when you work with AIX and your System p server? Do you ever feel you could save time by not having to call on the support professionals all the time? Well, wish no more. Shiv Dutta discusses some of the AIX commands that answer those questions and tells you how to enlarge the list of such answers.
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Articles |
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14 Oct 2008 |
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Advanced Accounting in WPAR
AIX 6.1 introduced the software-based partition technology, Workload
Partitions, that supports Advanced Accounting along with its generic features like
interval accounting, data aggregation, and dynamic classification of accounting data.
This article gives an overview on configuration of Advanced Accounting for WPARs with
examples, methods of enabling WPAR Accounting, and the various reporting tools available for viewing the accounting records.
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Articles |
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07 Oct 2008 |
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Using cron to automate maintenance
To leverage round-the-clock computing, tasks must run at all hours of the day. You could
punctuate your sleep with waking interludes to log in and run this command or that
command on
dozens of machines, or you can enjoy your forty winks and turn the work over to the
ubiquitous cron, a daemon, or perennial process, to execute commands on a schedule. From
very often to every so often, cron happily minds the clock and runs jobs day or night. Learn
how to configure and maintain cron, and discover just some of its many uses.
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Tutorials |
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07 Oct 2008 |
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Speaking UNIX: !$#@*%
Learn how to use pipelines, redirections, operators, and more in UNIX.
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Articles |
|
30 Sep 2008 |
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IBM Network Authentication Service for AIX backup and restore management
Learn how to back up your important Kerberos data as a part of your business
continuity plan and other backup processes. In the Kerberos production environment,
taking a regular and proper backup of Kerberos data is vital to ensure 24x7
reliable and consistent support to the users. This article educates the Kerberos
administrators on what data to consider for your backup plan.
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Articles |
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30 Sep 2008 |
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| |
IBM System Planning Tool (SPT) and the System p
The System Planning Tool (SPT) is a wonderful utility that is a must for any
System p architect or administrator. It is browser-based, and helps you architect
your entire managed system by assisting in the planning, design, and validation of
your system. Furthermore, it is tightly integrated with the IBM System Workload Estimator (WLE), which allows you to plan systems based upon either existing or new workloads. Follow along in this article for details on how to install and get the most from this important tool.
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Articles |
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23 Sep 2008 |
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AIX WPAR auditing
AIX V6.1 introduced the software-based partition technology called Workload
Partitions (WPAR). This article provides an overview of auditing subsystems in a WPAR
environment with examples about global auditing, WPAR auditing, and global-initiated
WPAR auditing. The article also presents information about the audit reporting tools
that can be used to view the audit records.
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Articles |
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23 Sep 2008 |
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| |
Expand the capabilities of your Tomcat Web server
This tutorial is a must-have guide for any Web or application server
administrator. Although the implementations are slightly different from Apache Tomcat and
other Web servers, this tutorial breaks down in a logical and concise way many
advanced administrative tasks necessary for successfully hosting, deploying, and managing multiple
Java 2 Platform, Enterprise Edition (J2EE) Web applications. Learn how to set up,
configure, and secure your Tomcat server, and discover tips and tools for advanced
deployment considerations.
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Tutorials |
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16 Sep 2008 |
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Crossing the border
For almost 15 years, z/OS has come with UNIX, in the form
of UNIX Systems Services (USS). However, programming between USS and traditional
z/OS (accessing USS services from native z/OS or vice versa) still remains a mystery for most programmers. This article fills in these gaps. It explains to native z/OS programmers how to benefit from UNIX on z/OS, and shows UNIX programmers how to interact with traditional z/OS.
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Articles |
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16 Sep 2008 |
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Speaking UNIX: More shell scripting techniques
Like other UNIX operating systems and Linux, the IBM AIX operating system has several powerful tools that arm systems administrators, developers, and users to tackle day-to-day tasks and to simplify their or their customers' business and life. One such tool in UNIX is the ability to write shell scripts to automate tasks, simplifying difficult or long and tedious jobs.
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Articles |
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09 Sep 2008 |
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IBM Network Authentication Service KDC configuration, Part 1: Configuration and management of slave KDC in IBM Network Authentication Service on AIX
Become an expert administrator of a reliable Kerberos environment with
high-availability involving multiple Kerberos master-slave Key Distribution Centers
(KDC) on AIX and many clients. In this article, part 1 of three-part series, learn
how to configure and manage the basic master-slave KDC setup. Part 2 will cover how
to update the slave KDC to the master KDC. Part 3 will educate how to configure the
master-slave KDC with LDAP as the back end for storing Kerberos data.
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Articles |
|
09 Sep 2008 |
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| |
Writing plug-ins in Python
Learn how to extend your Python command-line tools by writing plug-ins.
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Articles |
|
02 Sep 2008 |
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| |
KornShell 93 auditing
New features of the Korn Shell provide system administrators and management with the ability to monitor, track, record, and audit every command executed by any user of a system. This is different from the normal shell history, and provides detailed information that includes date, time, tty, user, and the command. This information can be stored locally or transmitted in real time to a remote logging system.
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Articles |
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02 Sep 2008 |
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Tcsh shell variables
Tcsh is one of the most popular UNIX shells. Learn how you can use tcsh shell variables to make your work easier and take advantage of tcsh's advanced security features.
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Articles |
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26 Aug 2008 |
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| |
Introduction to ProbeVue
Application development and troubleshooting can be difficult
tasks, even for a seasoned programmer or system administrator. Even the best debugger
and all its bells and whistles sometimes canât compete with the ability to use
simple print statements to capture the essence of what the application is doing. IBM
AIX V6 adds a new tool called ProbeVue to its arsenal of debugging tools. This article
briefly describes ProbeVue usage and its associated programming and scripting
language, concluding wit
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Articles |
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26 Aug 2008 |
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Speaking UNIX: The new and improved Vim editor
If you've worked on IBM AIX, another flavor of UNIX, or
Linux, you've more than likely used the vi editor. Since its conception in 1976, vi has
become a staple for anyone wanting to edit files. How could someone make a more powerful
editing tool than vi, you may ask? The answer is Vim, and this article provides details on the
many enhancements that have made Vim a highly used and acceptable editor in the world
of UNIX and Linux.
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Articles |
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19 Aug 2008 |
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Configure IBM NAS version 1.4.0.7 for AIX to make use of non-default encryption type
This article provides step-by-step procedures of how to enable and make
use of non-default encryption type such as "aes128-cts" in the Kerberos setup (IBM
Network Authentication Service). It also explains the reasoning behind every action taken in this regard. The
explanation and reasoning will help Kerberos administrators make use of any other
non-default encryption types in their Kerberos setups.
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Articles |
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19 Aug 2008 |
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| |
Using the GNU C/C++ compiler on AIX
Learn from IBM experts about using the GCC compiler on AIX(R). The
authors explain why you should use GCC compiler, which compiler options are
specific to pSeries, what you need to know about shared libraries, and common
gotchas and solutions. [Updated "Installing GCC on AIX" section
with new product levels and links.]
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Articles |
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12 Aug 2008 |
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| |
Using SQLAlchemy
SQLAlchemy is a next-generation Python Object Relational mapper. Learn how
to use the new 0.5 API, work with third-party components, and a build a basic
Web application.
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Articles |
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12 Aug 2008 |
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| |
Take a closer look at OpenBSD 4.3
OpenBSD provides a UNIX distribution with a primary emphasis on security
and cryptography. If you're looking for a UNIX distribution to deploy in the most critical nexus
in your network infrastructure, look no further than OpenBSD. The recent release of
OpenBSD -- version 4.3 -- includes several new features and bug fixes that this
article reviews.
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Articles |
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12 Aug 2008 |
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The importance of UNIX in SOA environments
These are exciting times in solution architecture -- days of Web 2.0,
SOA, Web services, mash-ups, and the full integration of technical solutions derived from
business models integrating with old and new systems alike. Discover how and why existing
systems and applications with which you are already familiar deployed on operating systems
that you know well are so critical to the present and future of Web-based computing,
particularly in the area of SOA.
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Articles |
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05 Aug 2008 |
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DB2 and the Live Partition Mobility feature of PowerVM on IBM System p using storage area network (SAN) storage
Learn about Live Partition Mobility, a feature of the System
p virtualization PowerVM Enterprise edition. See how
Live Partition Mobility
can be applied to DB2 deployments, and how it helps you migrate AIX and Linux partitions and
hosted applications from one physical server to another compatible physical server.
Live Partition Mobility allows hardware maintenance, firmware upgrades, system
maintenance, and on-the-fly server consolidation without application outage.
Setup, configuration, best-practices, and performance characterization for Storage Area Network (SAN)
and DB2 are covered.
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Articles |
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05 Aug 2008 |
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| |
Learning doxygen for source code documentation
Maintaining and adding new features to legacy systems developed using C/C++ is a
daunting task. Fortunately, doxygen -- a documentation system for the C/C++, Java, Python,
and other programming languages -- can help. Discover the features of doxygen in the
context of projects using C/C++ as well as how to document code using doxygen-defined tags.
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Articles |
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29 Jul 2008 |
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| |
AIX security commands
Security is an important aspect of the AIX operating system. Follow along
with this quick reference guide on AIX Security commands to learn more.
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Articles |
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22 Jul 2008 |
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| |
Traversing Red Hat Enterprise Linux 5 on System p
So you've been the AIX guru on your team for years now and your bosses have
determined that they want to try Linux on System p. You can fight the change, or
you can embrace it and learn Linux, if not learn to love it. The purpose of this
article is to introduce Linux to AIX administrators. It will show you what you
need to know to make the transition to Linux simpler. It will also show you the
equivalent commands to perform specific tasks and also discusses process
management, filesystem management, how to peruse systems information, install packages, and other important bits of information that you as the systems administrator will need to know. While you will not become an expert at Linux from this article, this should give you a good head start in what you need to know.
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Articles |
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22 Jul 2008 |
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| |
Install and configure a development Web server in UNIX
Get a detailed, step-by-step approach to installing and configuring a development or
test Apache Tomcat server. Along the way, pick up helpful tips on how to build and
administer your Web or application server in a UNIX environment.
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Tutorials |
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15 Jul 2008 |
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| |
From scripting to object-oriented Python programming
Often it is difficult to make the transition from procedural scripting to
object-oriented programming. This article
explores how to reuse knowledge from PHP, Bash, or Python scripting to transition to
object-oriented programming in Python.
The article also briefly touches on the appropriate use of functional programming.
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Articles |
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14 Jul 2008 |
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| |
Overview of utility classes from the Boost library
Utility-class development and maintenance eats into programmer time. Boost
simplifies the process by providing several high-quality libraries that you can easily integrate into your existing code base. This article gives a quick overview of some of the more popular Boost utility classes and helps you understand how to put them to work.
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Articles |
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08 Jul 2008 |
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| |
Understanding the Trusted Execution environment in AIX V6
This article covers the advanced security features of IBM AIX V6.1, Trusted
Execution environment. It educates AIX system administrators on how to ensure system
integrity at run-time as well as at stand-by time. This article, which acts as a
starting point to learn about the Trusted Execution environment, also covers the most commonly used commands and examples.
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Articles |
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08 Jul 2008 |
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| |
Enhanced password strength in IBM Network Authentication Service for AIX
In a Kerberos environment, protecting principals' passwords is imperative
to preserve the system security. Learn how Kerberos administrators can take advantage of
the password protection and password strength enhancement features provided by IBM
Network Authentication Service for AIX.
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Articles |
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01 Jul 2008 |
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Speaking UNIX: Just a few clicks
The way you interface with a computer is changing constantly. Operating systems that
once started as a command line-only interface have moved to a graphical front end.
Sometimes, however, moving away from the building blocks that made the operating
system isn't necessarily a step in the right direction. Thankfully, the IBM AIX operating
system has kept to what's important: the stability, functionality, and robustness of a
computer's operating system.
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Articles |
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01 Jul 2008 |
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Running Oracle on AIX
A systems administrator always needs to be cognizant of system performance. This article drills down into the many aspects of tuning AIX to run Oracle. We'll look at the Virtual Memory Manager (VMM), CPU, Memory and I/O (disk and network). We'll examine some of the tools that you can use to analyze bottlenecks, while also making some changes to the system. Finally, we'll also review some Oracle tools you can use to help with your performance tuning.
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24 Jun 2008 |
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Manage your logical volumes with Veritas Volume Manager (VxVM) V5 for AIX 5.3 and 6.1
Learn to install, configure, and troubleshoot Veritas (Symantec) 5.0 Volume Manager (VxVM) on AIX 5L and AIX 6 machines using command line options. The article includes a brief explanation of VxVM basic concepts, troubleshooting, and easy fixes for a few sundry problems.
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Articles |
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24 Jun 2008 |
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Korn shell scripting
Korn shell scripting is something all UNIX users should learn how to use. Shell scripting provides you with the ability to automate many tasks and can save you a great deal of time. It may seem daunting at first, but with the right instruction you can become highly skilled in it. This article will teach you to write your own Korn shells scripts.
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Articles |
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17 Jun 2008 |
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Easy procedure to assign disks from storage (DS8000/DS6000) to an AIX host
Assigning disks from storage disks (IIBM System Storage DS8000/DS6000) to an AIX host using
GUI is easy but time consuming. This article explains a easier and faster way
of assigning disks. You can use the this procedure to automate the disk-assigning process.
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Articles |
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17 Jun 2008 |
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Speaking UNIX: It is all about the inode
Have you ever wondered what Iused and %Iused mean in UNIX commands like df or what
people are talking about when the say inode? UNIX and Linux systems both use inodes, and
IBM AIX is no different. Discover what an inode is and why inodes are important to UNIX, the
structure of an inode, and commands for working with inodes.
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Articles |
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10 Jun 2008 |
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Concepts of WPARs and configuring DB2
WPAR (Workload Partition) is a licensed program product shipped
with IBM AIX 610. Tthis article teaches WPAR concepts and
configurations. By following the examples in this article, you will be able to install and configure
DB2 on a system and application WPAR.
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Articles |
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10 Jun 2008 |
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Live Application Mobility in AIX 6.1
The most popular innovation of AIX 6.1 is arguably workload partitioning. Workload partitioning allows you to have fewer operating system images on your managed system, which is accomplished by allowing virtualization of operating system resources. Live Application Mobility is an important component of workload partitioning and provides for increased availability for workload partitions (WPARs). Simply put, it allows you to move WPARs from one logical partition (LPAR) to another while the WPARs are up and running. It provides automatic, policy-based relocation of workload between systems using WPARs. This article explores how and when to use Live Application Mobility and how to configure a system and its applications to run it.
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Articles |
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03 Jun 2008 |
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Practical threaded programming with Python
Threaded programming in Python can be done with a minimal amount of complexity by combining threads with Queues.
This article explores using threads and queues together to create simple yet effective patterns for solving problems
that require concurrency.
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Articles |
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03 Jun 2008 |
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Configure and enable the Kerberos authentication in telnet, FTP, and r-commands on AIX V6
Learn to make use of the Kerberos authentication tickets in the day-to-day
network services on AIX V6 and discover how Kerberos can be useful in getting rid
of the password hassles for network service logons. This is another method towards
achieving single sign on (SSO) on an AIX system network.
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Articles |
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27 May 2008 |
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UNIX tips: Learn 10 more good UNIX usage habits
As a follow-up to Michael Stutz's excellent article, this article provides 10 more
good habits to adopt that will improve your UNIX command-line efficiency. Learn
about common errors and how to overcome them, and discover exactly why these
10 UNIX habits are worth picking up.
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Articles |
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27 May 2008 |
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Configuring Infiniband for AIX
IBM AIX 610 supports Infiniband hardware and various protocols that run over
Infiniband. This article shows how to configure Infiniband and set up IP over Infiniband
interface (IPoIB) in AIX. Also, this article explains how to use RDS (Reliable Datagram
Sockets), a protocol (similar to UDP) designed to work over Infiniband to send and
receive data using sockets.
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Articles |
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20 May 2008 |
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Tips on designing a preprocessor for C++ using Antlr
Learn how to use Antlr to create a C++ preprocessor. Using this approach to
create the C++ compiler, you don't need a separate preprocessor engine. Instead, the preprocessor engine can be integrated as part of the lexer.
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Articles |
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20 May 2008 |
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Speaking UNIX: Booting up
Ever wonder what makes a computer tick or how a UNIX server does what it does? For
those who wonder what happens when you push the power button on your computer,
here's your inside look. This article discusses the different boot types, managing the IBM
AIX bootlist, and the AIX boot sequence. After reading this article, you should have a
better understanding of what exactly is happening when your server starts.
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Articles |
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13 May 2008 |
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Automatic generation of configuration data for HACMP/XD-PPRC
HACMP/XD uses PPRC mirroring technology to provide disaster
recovery for critical applications' data. To achieve high availability for
distributed applications over extended distances, administrators need to configure
PPRC in an HACMP/XD environment. This involves collecting configuration data from
the storage as well as from the cluster nodes; at times this can be tedious. This
article shows you how, using pprc4hacmp, configuration data is generated for
HACMP/XD-PPRC automatically.
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Articles |
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13 May 2008 |
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Shared library memory footprints on AIX 5L
Learn about shared library mechanisms and memory footprints on AIX. This article
is essential for developers writing server code or administrators managing production
AIX systems. It offers developers and administrators commands and techniques, and gives
the understanding necessary to analyze memory requirements of server processes on AIX.
It also helps developers and administrators avoid resource shortages that can't be
identified with other standard runtime analysis tools such as ps or topas. The article is intended for systems administrators or developers of native
applications on AIX.
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Articles |
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06 May 2008 |
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openssh with AIX chroot
Sometimes you might want to restrict users to specific directories so that they are
not able to look into the whole system. This can be achieved by creating the
chroot users. This article describes how to set up an AIX chroot environment and use
it with ssh, sftp, and scp. You will also learn about the prerequisites for AIX and
openssh, and how to configure and use a chroot environment. A downloadable sample shell script that automatically sets up this environment is also provided.
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Articles |
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05 May 2008 |
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Learn the Perl/Tk module, Part 3: Advanced widgets
Although Perl-based Web interfaces have limitations, Perl is one of the most commonly used Web development languages. UNIX users who have a programming background in shell scripting, Perl, or another language can breathe new life into Perl-based Web interfaces by using the Perl/Tk module.
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Articles |
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29 Apr 2008 |
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Speaking UNIX: Inside TCP/IP
The Internet has played a huge role in the advancement of technology, business, and
everyday life for huge numbers of the world's people. Configuring a computer to
communicate over a network and connecting to the Internet has become an essential task
for administrators. This article shows how to configure a server running IBM AIX to connect to and use
the Internet.
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Articles |
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22 Apr 2008 |
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Example-driven ZODB
Relational databases are not the only solution available for Python programmers in the enterprise. Often an
object database can be a more natural fit for solving certain problems. This article
discusses ZODB,
a scalable and redundant object database that specializes in storing extensible objects, without the natural
Object-relational impedance mismatch that can occur by attempting to make an Object Oriented Language and a
Relational Query System map objects to relations.
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Articles |
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15 Apr 2008 |
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Systems Administration Toolkit: Using SNMP data
The Simple Network Management Protocol (SNMP) is built in to many devices, but
often the tools and software that can read and parse this information are too large and
complicated when you only want to check a quick statistic or track a particular device
or issue. This article looks at some simplified methods for getting SNMP information
from your devices and how to integrate this information into the rest of your network's data map.
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Articles |
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15 Apr 2008 |
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Discover the Boost Filesystem Library
The absence of a well-defined library that deals with file system manipulation is a
long-running issue for the C++ language. In the past, programmers have had to use native
APIs to work around the problem. Discover a library that provides a safe, portable, and
easy-to-use C++ interface to facilitate file system operations: the Boost Filesystem
Library.
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Articles |
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08 Apr 2008 |
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Workload Partitioning (WPAR) in AIX 6.1
The most popular innovation of IBM AIX Version 6.1 is clearly workload
partitioning (WPARs). Once you get past the marketing hype, you'll need to determine the value that WPARs can provide in your environment. What can WPARs do that Logical Partitions (LPARs) could not? How and when should you use WPARs? Equally as important, when should you not use Workload Partitioning. Finally, how do you create, configure, and administer workload partitions? These topics will all be discussed in this article.
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Articles |
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08 Apr 2008 |
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Implementing Java on AIX: Download, installation, and configuration
Get short, simple, and complete instructions for downloading,
installing, and configuring Java for the IBM AIX operating system from
the IBM Systems, UNIX, and ISV Technical Support Team for AIX and Java in Austin, Texas. If you take the steps in the article before contacting the support center for problems, you can save a lot of time and headaches.
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Articles |
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01 Apr 2008 |
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Discover tput
One of the strongest assets UNIX has is the ability to make shell scripts to ease
users' lives. These scripts can range from simple one-liners to several thousand
lines. Many times, shell scripts evolve into menu-based scripts, and the scripter
wants to display more to users than simply scrolling text. Other times, a simple
line or two of output are displayed to users, and the shell scripter wants to put
emphasis on a warning message.
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Articles |
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01 Apr 2008 |
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Troubleshooting Java code on AIX: Data collection for AIX core dumps
Do you want to save some time? This article has instructions for
troubleshooting Java code for the IBM AIX operating system. In this article, the
IBM Java Support on AIX Technical Team provides short, simple, and complete instructions for collecting an AIX core
file and other files for analyzing process exceptions with Java applications running
on AIX. You'll also learn how to package and send data to IBM Support.
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Articles |
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25 Mar 2008 |
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Configuring and troubleshooting ITDS 6.1 on AIX
This article is an introduction to the IBM Tivoli Directory Server and the use of
native LDAP commands to create, configure, and unconfigure an ITDS instance.
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Articles |
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25 Mar 2008 |
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Shell Curses function library
"Shell Curses" is a library of script functions that provide the shell
programmer the ability to perform text-based cursor movements to specified locations
on the screen. This ability permits the creation of menuing and data-entry systems using shell scripts without the need for compiled binaries. These functions are similar to the "C" language "Curses" library.
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Articles |
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25 Mar 2008 |
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Using Python to create UNIX command line tools
If you work in IT, as a UNIX Sysadmin, a software developer, or even a manager,
there a few skills that will set you apart from the crowd. Do you fully understand the
OSI model? Are you comfortable with subnetting? Do you understand UNIX
permissions? Let me add to this list the humble command line tool. By the end of this
article, anyone involved in IT at any capacity should be able to create at least a
simple command line tool.
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Articles |
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18 Mar 2008 |
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Building custom language parsers
There are certain things about ANTLR that, if understood, help in faster debugging
and provide a fuller appreciation of how the tool works. Learn how to use ANTLR to create
smarter parsing solutions.
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Tutorials |
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11 Mar 2008 |
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Changing UIDs and GIDs
It's important to know what happens to file ownership in AIX once you make a UID or GID change. If you don't
understand the results of altering a UID or GID, you could cause serious issues to your server and
environment.
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Articles |
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04 Mar 2008 |
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Systems Administration Toolkit: Understanding DNS
The Domain Name System (DNS) is the service that converts hostnames and domain
details into the IP addresses required for application to communicate. Under UNIX, the
primary DNS service is based on BIND, and DNS itself is a key part of most UNIX
installations. This article looks at the basics of DNS setup, how servers and requests are distributed and exchanged, and how to set up and keep a DNS environment running smoothly.
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Articles |
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04 Mar 2008 |
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Systems Administration Toolkit: Log file basics
A typical UNIX or Linux machine creates many log files during the course of its
operation. Some of these contain useful information; others can be used to help you
with capacity and resource planning. This article looks at the fundamental information recorded within the different log files, their location, and how that information can be used to your benefit to work out what is going on within your system.
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Articles |
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26 Feb 2008 |
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Extending non-IBM LDAP servers to support full AIX functionality
Managing users and controlling their access in a centralized LDAP
environment is a challenging task in a heterogeneous environment. Some platforms may lose their OS-specific functionality due to the lack of schema support from the LDAP server. This presents a solution for some non-IBM LDAP servers to support full AIX user management functionality by providing the AIX LDAP schema for these server types, the steps for updating these LDAP server type with the schema, and the proper configuration on AIX to take advantage of the added AIX LDAP schema.
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Articles |
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19 Feb 2008 |
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Building your own memory manager for C/C++ projects
Performance optimization of code is serious business. It's fairly common to see a
piece of functionally correct software written in C or C++ that takes way
too much memory, time, or, in the worst case, both. As a developer, one of the most
powerful tools that C/C++ arms you with to improve processing time and prevent
memory corruption is the control over how memory is allocated or deallocated in your
code. This tutorial demystifies memory management concepts by telling you how to
create your very own memory manager for specific situations.
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Tutorials |
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19 Feb 2008 |
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Transition to AIX from Solaris
You've been working with Solaris for ten years now and, like many other
companies, you have just started a large server consolidation and migration project
to AIX(R) 6.1 from Solaris 10. Many of the commands are similar, but you need to
know how to work with partitioning and virtualization. What are the partitioning
differences between an IBM(R) and Sun server? Furthermore, what do you need to know
about workload partitions (WPARs) to make a successful transition from containers?
What are some of the similarities and differences between WPARs and zones, and how
does the process differ from creating zones and WPARs? Finally, what can you do on
the IBM System p(TM) that you can't do with Sun servers? These are some of the
questions addressed in this article, with the objective of making your transition
easier.
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Articles |
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12 Feb 2008 |
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Secure RPC using DES authentication on AIX 5.3
Find out how to use Secure RPC using Data Encryption Standard (DES)
authentication on AIX(R) 5.3 to achieve a secure communication between the client
and server. In this article, you'll examine the setup required to initiate Secure
RPC between the client and server, DES authentication, and how to make applications
secure using the Secure RPC application programming interfaces (APIs).
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Articles |
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12 Feb 2008 |
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Optimizing AIX 6.1 performance tuning
Just when you thought you understood performance tuning on AIX(R) Version
5.3, here comes AIX 6.1 on its heels to throw you a curveball. In this article, get
up-to-date information on the recent changes to performance monitoring and tuning in
AIX 6.1, including CPU, virtual memory, and I/O (disk and network). Many of the changes are really less about kernel innovations and
more about ancillary changes, such as improving default parameters to more
accurately reflect real-world data processing. Other enhancements include unique
tunable documentation, restricted tunables, and various other improvements to
certain subsystems. You'll learn more about a performance tuning methodology, which
needs to be a part of any tuning strategy.
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Articles |
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05 Feb 2008 |
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Optimizing AIX 5L performance: Tuning network performance, Part 3
This three-part series on AIX (R) networking focuses on the challenges of
optimizing network performance. Part 1
provided a networking overview and also
discussed the tools you need to monitor your hardware, including netstat, netpmon,
entstat, and nmon. Part 2 discussed monitoring and tuning NFS subsystems. This final
part, Part 3, shows you how to monitor network packets. The series also offers best
practices for network I/O performance tuning.
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Articles |
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29 Jan 2008 |
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Understanding EFS
Safeguard your data with the Encrypted File System (EFS), a new AIX(R) 6.1
security feature, and get a comprehensive picture on the configuration of EFS and
its usage. EFS can store the content of a file in an encrypted format at the file
system level. If you’re new to EFS, this article is a good starting point for
reviewing the need for EFS, its features, and most commonly used commands.
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Articles |
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29 Jan 2008 |
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Optimizing AIX 5L performance: Tuning network performance, Part 2
This three-part series on AIX (R) networking focuses on the challenges of
optimizing network performance. Part 1provided a networking overview and also
discussed the tools you need to monitor your hardware, including netstat, netpmon,
entstat, and nmon. Part 2 focuses on tuning NFS. You'll learn about monitoring
utilities such as nfsstat and nmon, and you'll also tune with nfso. The series also
offers best practices for network I/O performance tuning.
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Articles |
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22 Jan 2008 |
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Systems Administration Toolkit: Spam and virus filtering for e-mail
Look beyond tools like SpamAssassin and Amavis to see how you can extend
them and provide additional filtering facilities to lower the amount of spam hitting
the e-mail boxes of your users. Most companies use spam and virus filtering services
on their UNIX(R) platforms, but there are some methods that you can use that help
improve your filtering scores and might even eliminate spam reaching inboxes.
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Articles |
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22 Jan 2008 |
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Develop with Java and PHP technology on AIX Version 5.3, Part 6: Building the Java business application
Set up a PHP Web interface for the Java(TM) business application using a
database created in earlier in this series. The PHP Web interface collects
information from users and sends the session data to the Java business application
for processing and for a response.
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Tutorials |
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15 Jan 2008 |
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AIX NFS Version 4 configuration over Kerberos inter-realm setup
Learn how to configure an inter-realm setup between IBM(R) Network
Authentication Service (IBM NAS) and Microsoft(R) Active Directory for AIX(R)
Network File System (NFS) Version 4.
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Articles |
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08 Jan 2008 |
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Overview of AIX page replacement
Go through detailed information on how the AIX(R) virtual memory manager
(AIX VMM) works and how to use tunable parameters to adjust the operation of the AIX
VMM. The AIX VMM is responsible for managing all of the memory on a system. The
operation of the AIX VMM is critical to the performance of a system, and it also
provides several tunable parameters that you can use to optimize its operation for
different workloads.
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Articles |
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08 Jan 2008 |
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IBM Network Authentication Service KDC and administration servers discovery
using LDAP for AIX
Implement effective ways to configure IBM(R) Network Authentication Service
(IBM NAS) with Lightweight Directory Access Protocol (LDAP) on AIX(R) to get the
maximum reliability and scalability in your Kerberos environment. This article shows
you different ways of setting up the dynamic, yet consistent, Kerberos environment.
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Articles |
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31 Dec 2007 |
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Systems Administration Toolkit: Monitoring mail usage
Examine methods for reporting on e-mail usage and getting detailed
statistics on mailbox use. E-mail logs can provide a wealth of information about
your users and their e-mail habits, including how often and frequently they use
their e-mail. Depending on your UNIX(R) systems, you might even be able to glean
more detailed information, such as identifying which users are using their folders
effectively and who could benefit from further training and advice.
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Articles |
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18 Dec 2007 |
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Configuration of AIX Fast Connect and SMBFS
Follow along with this quick reference guide to configure AIX(R) Fast Connect and
SMBFS on AIX and Windows(R).
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Articles |
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18 Dec 2007 |
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Using Net-SNMP and IPython
Data centers and production facilities are embracing Simple Network
Management Protocol (SNMP) as a way to get a handle on dense and complex
infrastructures. The Net-SNMP library now has Python(TM) bindings, and it is an
excellent choice to write custom code to manage a data center or supplement
full-blown Network Management Systems (NMS). Due to the complexity of SNMP, using an
interactive tool like IPython can make all the difference. In this article, learn
how to use Net-SNMP, Python, and the IPython shell to interactively explore and
manage a network.
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Articles |
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11 Dec 2007 |
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Kerberos policy management in IBM Network Authentication Service for AIX
Version 5.3
Use IBM(R) Network Authentication Service (IBM NAS) for AIX(R) to learn more
about the Kerberos policy management for passwords, and get acquainted with anything
and everything about IBM NAS policy. Also examine complete commands, examples, and
scenarios to assist you in using the kerberos password policy to its fullest.
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Articles |
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11 Dec 2007 |
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Accessing DFS and NFS V4 directories simultaneously
This article provides guidance to DCE or DFS users who are migrating
from DCE or DFS to Kerberos/NFS V4. During the
transition period, these users need to be authenticated and authorized to use both DFS
and NFS V4 directories. This article answers some basic questions, such as,
"Can the DCE authentication server be used as a Kerberos server for NFS V4 with a
Kerberos client?"
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Articles |
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04 Dec 2007 |
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Systems Administration Toolkit: Network scanning
Discover how to scan your network for services and how to regularly monitor
your services to keep uptimes to a maximum. A key way of ensuring the security of
your network is to know what is on your network and what services individual
machines are at risk of exposure. Unauthorized services, such as Web servers or file
sharing solutions, not only degrade performance, but others can use these services
as routes into your network. In this article, learn how to use these same techniques
to ensure that genuine services remain available.
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Articles |
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04 Dec 2007 |
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Learn the Perl/Tk module, Part 2: Intermediate widgets
Although Perl-based Web interfaces have limitations, Perl is one of the most
commonly used Web development languages. UNIX(R) users who have a programming
background in shell scripting, Perl, or another language can breathe new life into
Perl-based Web interfaces by using the Perl/Tk module. In this second article of the
series, learn about intermediate widgets, including radiobutton, checkbutton, menu, menubutton, and
scrollbar.
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Articles |
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27 Nov 2007 |
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Configuring Network Information Service server and client on AIX
Security and user and group management are important aspects with respect to
any operating system. In distributed networks, one of the most important tasks is to
maintain the user and group information. For centralized management, many customers
use Network Information Service (NIS). This article provides an overview of NIS and
the steps to install and configure NIS as a server and client.
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Articles |
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27 Nov 2007 |
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Optimizing AIX 5L performance: Tuning network performance, Part 1
This three-part series on AIX(R) networking focuses on the challenges of
optimizing network performance. In the first installment, you’ll review some best
practices for network configuration, and utilize those practices for efficient
monitoring of your hardware by taking advantage of network tools such as netstat,
netpmon, entstat, and nmon. You’ll also examine certain tools used to look at your
interfaces to see how to configure them.
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Articles |
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20 Nov 2007 |
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AIX 6.1 Workload Partitions
Workload Partitions (WPARs) are a new virtualization feature of AIX 6.1.
This article helps you decide whether WPARs are right for your AIX workloads, and
then gives you step-by-step guidance on how to learn more about WPARs and begin
using them.
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Articles |
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20 Nov 2007 |
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Emacs editing environment, Part 7: Let Emacs help you out
Part 7 of this series shows you why Emacs is the self-documenting
editor, and the many ways in which you can take advantage of the help and assistance
offered in this editor. In this tutorial, learn about describing keystrokes,
commands, and functions. You'll also read, browse, and search through a complete
Emacs reference manual.
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Tutorials |
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13 Nov 2007 |
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Virtualization in System p
Capitalize on the benefits virtualization can provide to maximize
the usage of your resources. Virtualization is a modern approach and is available on
all System p(TM) servers, starting from POWER4. This article discusses physical
and logical partitioning, with special relevance to how to implement logical
partitioning.
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Articles |
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13 Nov 2007 |
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Windows to UNIX porting, Part 2: Internals of porting C/C++ sources
Part 1 of this series covered the typical C/C++ project types you work with
in a Microsoft(R) Visual Studio(R) environment and introduced the processes of porting
dynamic and static library project variants to a UNIX(R) platform. Part 2 delves
into some of the compiler options used to build Visual C++ projects and the UNIX and
g++ equivalents, takes a closer look at the g++ attribute mechanism as it relates to
porting, and examines some common problems you might encounter while porting from a
32-bit Windows(R) environment to a 64-bit UNIX environment. It concludes with an
overview of concepts for porting multithreaded applications and an example project
that shows you how to pull all these pieces together.
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Articles |
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06 Nov 2007 |
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Know your TCP system call sequences
The TCP/IP programming interface provides various system calls to
help you effectively use the protocol. The TCP stack code is vast, and a complete
call sequence down to the kernel level would help in understanding the TCP stack.
This article is a one-stop shop for details about TCP stack level function calls and
describes the sequence of function calls, at the kernel level, when system calls are
made at the application level. In this article, review and study the TCP call sequence, including references to FreeBSD and
important function calls that occur in the TCP stack after a system call is made at
the user level.
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Articles |
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06 Nov 2007 |
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Maximizing Java performance on AIX: Part 2: The need for speed
This 5-part series provides several tips and techniques that are commonly used for tuning Java(TM) applications for optimum performance on AIX(R). A discussion of the applicability of each tip is also provided. Using these tips, you should be able to quickly optimize the Java environment to suit your application's needs.
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Articles |
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03 Nov 2007 |
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Key-enabling kernel extensions for the IBM AIX Version 6.1 operating system
Diagnose and service memory overlays and addressing errors more efficiently
with POWER6(TM) processors and AIX(R) Version 6.1. In the AIX operating system,
software components share the kernel address space, creating a serviceability issue
for the AIX kernel and kernel extensions.
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Articles |
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30 Oct 2007 |
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The power of Network Installation Manager
Get step-by-step instructions for configuring a Network Installation Manager
server and clients using the smitty tool. If you have an environment with many
AIX(R) systems, then you know that installing, upgrading, and maintaining the
software can take a considerable amount of time. The AIX Network Installation Manager can help you
with installation and software maintenance in a client and server environment.
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Articles |
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30 Oct 2007 |
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Exchange data using arrays in SQL PL
IBM DB2 9.5 for Linux, UNIX and Windows introduces support for array data types
in SQL Procedural Language (SQL PL). In addition to being useful as a data structure to develop algorithms, arrays
are particularly useful in SQL PL as a vehicle for exchanging collections of data
between applications and stored procedures and between stored procedures and relational
statements. This article gives you an overview of arrays in SQL PL and includes examples
that illustrate the different operations on
arrays, the different ways of creating array values, and the use of arrays on the client
side. You will also see a brief comparison of DB2's arrays with the VARRAY data type supported in Oracle.
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Articles |
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25 Oct 2007 |
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Systems Administration Toolkit: Monitor user usage
Explore new ways to record UNIX(R) logins and other system activities in a
number of different logs, and take advantage of this information to monitor user usage. This can
be helpful from a number of perspectives, either to use for chargeback reporting or
just to get an idea of how busy and active individual users are on the system to
help when planning and allocating resources.
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Articles |
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23 Oct 2007 |
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developerWorks download
This is a developerWorks download, abc, to help developers code.
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Articles |
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18 Oct 2007 |
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High-performance network programming, Part 2: Speed up processing at both the client and server
This article provides more techniques for UNIX(R)-based programmers who want
to enhance their network throughput. Learn how to speed up processing at both the
client and server using mmap, gathering scattered I/O, and other methods.
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Articles |
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16 Oct 2007 |
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POSIX file capabilities: Parceling the power of root
Linux has been using capabilities for years, but has recently acquired POSIX
file capabilities. POSIX file capabilities split root user powers into smaller
privileges, such as the ability to read files or to trace processes owned by another
user. By assigning capabilities to a file, you can enable an unprivileged user to
execute the file with those specified privileges. In this article, learn how to
program using capabilities and how to switch on the ability of your system setuid
root binaries to use file capabilities.
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Articles |
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16 Oct 2007 |
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Learn the Perl/Tk module, Part 1: The basics of Perl/Tk
Although Perl-based Web interfaces have limitations, Perl is one of the most
commonly used Web development languages. UNIX(R) users who have a programming
background in shell scripting, Perl, or another language can breathe new life into
Perl-based Web interfaces by using the Perl/Tk module.
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Articles |
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16 Oct 2007 |
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DB2 problem determination using AIX commands and utilities
Are you a DBA for a DB2 installation on AIX? Read on, to learn how you can use
AIX utilities and commands to administer and troubleshoot issues that affect the
operation of your DB2 database such as CPU usage,
orphan processes, memory leaks, hangs, and more. This article also discusses the data collection process, which you can use to troubleshoot problems yourself or to send collected data over to IBM Technical Support.
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Articles |
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11 Oct 2007 |
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Optimizing AIX 5L performance: Tuning disk performance, Part 3
Part 3 of this series covers how to improve overall file system performance,
how to tune your systems with the ioo command, and how to use the filemon and
fileplace utilities.
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Articles |
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09 Oct 2007 |
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Implement lower timer granularity for retransmission of TCP
Reduce the overhead of per-tick processing with a timer wheel algorithm that
implements the retransmission timer. The AIX(R) Transmission Control Protocol (TCP)
has seven timers (per-connection) and uses global timer functions with two
granularities to implement the timers. In this article, learn how to get lower
granularity with your retransmission timer by using the AIX TCP fast timer, and
discover other advantages of lower timer granularity.
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Articles |
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09 Oct 2007 |
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High-performance network programming, Part 1: Squeeze maximum usage out of your network resources
If you have UNIX(R)-based programming experience, then you've probably
worried at some point about enhancing your network throughput. In this article,
learn some useful techniques to squeeze the most out of your bandwidth, and get a
big performance boost with some of the methods described here.
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Articles |
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02 Oct 2007 |
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nanoHUB does remote computing right
nanoHUB is a virtual computing center created to support nanotechnology
research. It uses open source components to achieve far more powerful results than
previous "remote access" facilities. This article details specific configurations
and enhancements necessary to make the most of the performance, security, and
usability such common software as VNC and WebDAV provides.
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Articles |
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02 Oct 2007 |
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Emacs editing environment, Part 6: Customize your Emacs world
This tutorial, the sixth in a series, walks you
through some of the useful ways you can customize and configure the Emacs
environment. Learn how to change everything about the Emacs environment to your
liking, from the behavior of minor modes to the default key bindings. Along the way,
figure out how to set variables, make all your customizations automatic with a startup file,
save and recall any window and frame customizations that you make, and use the easy
customizer that comes built into Emacs.
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Tutorials |
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02 Oct 2007 |
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Isolate and resolve memory leaks using MALLOCDEBUG on AIX Version 5.3
Take advantage of MALLOCDEBUG, the malloc subsystem monitoring tool shipped with AIX(R) Version 5.3 that helps you isolate memory leaks. Memory leaks can be tough and costly problems to solve, so it makes sense to use good tools to clearly point out and understand where the leaks are coming from. Study the example code presented in this article and use it as an approach to tackle memory leaks.
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Articles |
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25 Sep 2007 |
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Speaking UNIX, Part 13: Ten more command-line concoctions
This month, discover ten more secrets of the UNIX command-line wizards.
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Articles |
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25 Sep 2007 |
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Logical volume management
Volume management is not new in the -ix world (UNIX, AIX, and so forth). And
logical volume management (LVM) has been around since Linux kernel 2.4v1 and
2.6.9v2. This article reveals the most useful features of LVM2--a relatively new
userspace toolset that provides logical volume management facilities--and suggests
several ways to simplify your system administration tasks. Based on reader feedback,
the author has updated Listings 10, 14, 15, and 16. -Ed.
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Articles |
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20 Sep 2007 |
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Windows to UNIX porting, Part 1: Porting C/C++ sources
Software programs are often made to run on systems that are completely
different from the system in which the program is coded or developed. This process
of adapting software across systems is known as porting. You might need to port
software for any one of several reasons. Perhaps your end users want to use the
software in a new environment, such as a different version of UNIX(R), or perhaps
your developers are integrating their own code into the software to optimize it for
your organization's platform.
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Articles |
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18 Sep 2007 |
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AIX disaster recovery
Recovering AIX(R) IT resources after a disaster requires the personnel
performing the recovery to concentrate on working the prepared plan. Unexpected
deviations from the plan can cause immense delays in the disaster recovery project. Often, these
unexpected deviations are due to a lack of adherence to business continuity
policies, guidelines, standards, and procedures. This article identifies resource
conflicts that typically occur during a disaster recovery implementation and
provides suggestions for resolving these conflicts.
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Articles |
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18 Sep 2007 |
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Top ten AIX and UNIX articles and tutorials—August 2007
See what AIX(R) and UNIX(R) content your peers found most valuable.
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11 Sep 2007 |
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Systems Administration Toolkit: Testing system validity
Examine methods of storing and later checking the validity of your
configuration files. Despite all the security systems you have in place, it is still
possible that somebody has accessed your system and changed your configuration or
security settings.
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Articles |
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11 Sep 2007 |
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Python for system administrators
Adopt Python to manage UNIX(R) systems while incorporating concepts of good program
design. Python is an easy-to-learn, open source scripting language that lets system
administrators do their job more quickly. It can also make tasks more fun.
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Articles |
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07 Sep 2007 |
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Simplified kernel extensions with AIX Version 6
Discover why you need to change your applications and build environments
that supply 32-bit-only kernel extensions to accommodate IBM AIX(R) Version 6. With
AIX Version 6, the kernel environment is 64-bit kernel only. Previously, the AIX
operating system provided both 32-bit and 64-bit kernels, requiring 32-bit and
64-bit kernel extensions. In this article, apply two easy solutions to help you make
the transition and start reaping the benefits of the simplified kernel environment.
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Articles |
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28 Aug 2007 |
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Install and configure NIS+
Ease your system administration tasks and use Network Information Service
plus (NIS+) to quickly handle maintenance and security issues for information. NIS+
is a network-wide naming and administration service that works on a client-server
model. The server maintains all the details of the users and clients in a central
database. In this article, get step-by-step instructions on how to install,
configure, and administer NIS+.
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Articles |
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28 Aug 2007 |
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Develop with Java and PHP technology on AIX Version 5.3, Part 5: Installing and integrating the PHP Java Bridge
It is possible to develop applications that employ both Java(TM) and PHP
technology on AIX(R). Part 5 of this six-part series teaches you how to install, set
up, and integrate the PHP Java Bridge into the Tomcat application server, making you
all set for developing a PHP Web interface.
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Articles |
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21 Aug 2007 |
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Speaking UNIX, Part 12: Do-it-yourself projects
If your UNIX(R) system lacks a tool you need, chances are you can find an
apt solution in the enormous inventory of software available online. This month,
learn how to build software from source code.
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Articles |
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21 Aug 2007 |
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Logging in multi-threaded applications efficiently with ring buffer
No software is bug free, and application users can encounter unexpected
results during the run time of programs. To analyze and find the cause of problems,
logging is a method widely used by programmers. In this article, learn how to use a
ring buffer for efficient logging with memory operations in place of file
operations. Choosing an appropriate size for the buffer ensures that relevant
messages are dumped, which can help when debugging.
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Articles |
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14 Aug 2007 |
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System Administration Toolkit: Distributed administration using SSH
Use Secure Shell (SSH) to run commands on remote UNIX(R) systems and, with
some simple scripts, put together a system that enables you to manage many systems
simultaneously from one machine without having to log in directly to the machines
themselves. Also examine the basics of a distributed management system and some
scripts and solutions using the technique.
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Articles |
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14 Aug 2007 |
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Use auditing to track reads and writes in a file
In this article, discover how to track several events on AIX(R) with auditing, a major
feature of AIX security, and learn how to use auditing to keep track of the read and
write operations on a file. Also examine commands, such as ls or istat,
to check a file's time stamp.
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Articles |
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07 Aug 2007 |
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Emacs editing environment, Part 5: Shape your Emacs view
This tutorial, the fifth in a series,
shows you how to manage and manipulate the shape your Emacs session -- examine how to
partition the Emacs screen, create multiple X client windows for a single Emacs
session, and display multiple buffers in each window, dividing the screen with
horizontal and vertical divisions. You also learn about mouse window control and
characteristics so that by the time you're through, you can make your
Emacs session look and work the way you want it to.
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Tutorials |
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07 Aug 2007 |
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Expect plays a crucial role in network management
Expect is an indispensable tool for efficient system and network management,
and it's also widely misunderstood. In this article, find out the benefits Expect
provides in common use cases.
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Articles |
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31 Jul 2007 |
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Develop with Java and PHP technology on AIX Version 5.3, Part 4: Building the Java business application
Part 4 of this six-part series shows you how to deploy a Java(TM) business
application and database as a Java Web service running on a pSeries(R) system with
the IBM AIX(R) 5.3 operating system.
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Tutorials |
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24 Jul 2007 |
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Optimizing AIX 5L performance: Tuning disk performance, Part 2
Discover how to use appropriate disk placement prior to creating your
logical volumes to improve disk performance. Part 2 of this series focuses on
monitoring your logical volumes and the commands and utilities (iostat, lvmstat,
lslv, lspv, lsvg) used to analyze results.
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Articles |
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24 Jul 2007 |
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Leverage Nagios with plug-ins you write
Learn more about Nagios and find out what new system monitoring possibilities exist
with this software. Nagios is open source monitoring software that scans hosts, services, and
networks for problems. The two main differences between Nagios and other similar
packages are that Nagios reduces all information to "working," "questionable,"
and "failure" statuses; and Nagios supports a particularly rich "ecosystem" of
plug-ins. These features result in effective installations where users are not
overwhelmed with details, but have just the information they need.
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Articles |
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17 Jul 2007 |
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Emacs editing environment, Part 4: Options, registers, and bookmarks
Take charge of your editing session within Emacs and use it to your
advantage. This tutorial is the fourth in a series, and shows you three areas of
Emacs that control some aspect of the editing session: various command-line options,
the register, and bookmark facilities for setting and saving positions and data.
Knowing how and when to use these features, and what tricks are possible with them,
are important topics in power editing.
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Tutorials |
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17 Jul 2007 |
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Top ten AIX and UNIX articles and tutorials—July 2007
See what AIX(R) and UNIX(R) content your peers found most valuable.
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15 Jul 2007 |
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Optimizing AIX 5L performance: Tuning disk performance, Part 1
Learn more about direct I/O, concurrent I/O, asynchronous I/O, and best
practices for each method of I/O implementation. This three-part series on the
AIX(R) disk and I/O subsystem focuses on the challenges of optimizing disk I/O
performance. While disk tuning is arguably less exciting than CPU or memory tuning,
it is a crucial component in optimizing server performance. In fact, partly because
disk I/O is your weakest subsystem link, you can do more to improve disk I/O
performance than on any other subsystem.
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Articles |
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10 Jul 2007 |
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Top ten AIX and UNIX articles and tutorials—June 2007
See what AIX(R) and UNIX(R) content your peers found most valuable.
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10 Jul 2007 |
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System Administration Toolkit: Build intelligent, unattended scripts
Look at how to create scripts that are able to record their output, trap and
identify errors, and recover from errors and problems so that they either run
correctly or fail with a suitable error message and report. Building scripts and
running them automatically is a task that every good administrator has to handle,
but how do you handle the error output and make intelligent decisions about how the
script should handle these errors? This article addresses these issues.
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Articles |
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03 Jul 2007 |
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Speaking UNIX, Part 11: Ramble around the UNIX file system
Many directories in the UNIX(R) file system serve a special purpose, and
certain directories are named per long-standing convention. In this installment of
the "Speaking UNIX" series, discover where UNIX stores important files.
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Articles |
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21 Jun 2007 |
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Develop with Java and PHP technology on AIX Version 5.3, Part 1: Setting up the Java environment
Develop a Java(TM) application on AIX(R) and learn how to extend it by using
a PHP interface to look at the underlying Java code. It is possible to develop
applications that employ both Java and PHP technology on AIX. You can use Java code
for the core logic (or redeploy an existing Java-based application), while gaining
the benefits of PHP as a Web-based interface platform. This article, the first in a
series, examines the basics of the Java programming language and PHP integration
methods on AIX, provides a quick overview of a sample application that uses this
structure, and then looks at the core elements required before you start developing
the application itself by installing the Java programming language and Apache
Tomcat.
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Articles |
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20 Jun 2007 |
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Top ten AIX and UNIX articles and tutorials—May 2007
See what AIX(R) and UNIX(R) content your peers found most valuable.
|
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20 Jun 2007 |
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Top ten AIX and UNIX articles and tutorials—April 2007
See what AIX(R) and UNIX(R) content your peers found most valuable.
|
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20 Jun 2007 |
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Optimizing AIX 5L performance: Tuning your memory settings, Part 3
Get an introduction to swap (paging) space, learn how to configure and
administer it, capture statistics, and tune your Virtual Memory Manager (VMM)
settings to provide for optimum swap (paging) space configuration and performance.
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Articles |
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19 Jun 2007 |
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Develop with Java and PHP technology on AIX Version 5.3, Part 3: Integrating the Java business application with DB2 Version 9
It is possible to develop applications that employ both Java(TM) and PHP
technology on AIX(R). You can use the Java programming language for the core logic
(or redeploy an existing Java-based application), while gaining the benefits of PHP
as a Web-based interface platform. In this article, the third of the series, find
out how to connect the core application created in the second installment to a
DB2(R) database for the storage of the survey questions and responses.
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Articles |
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19 Jun 2007 |
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Optimizing AIX 5L performance: Tuning your memory settings, Part 2
Use ps, sar, svmon, and vmstat to monitor memory usage and analyze the
results. This three-part series focuses on the various aspects of memory management
and tuning on IBM System p(TM) servers running AIX(R). Part 1 provided an overview
of memory on AIX, including a discussion of virtual memory and the Virtual Memory
Manager (VMM). It also drilled down into the tuning parameters and outlined recent
improvements in AIX Version 5.3 with respect to memory management. Part 2 focuses on
the detail of actual memory subsystem monitoring and discusses how to analyze the
results. Part 3 deals specifically on swap space and how best to tune your VMM
settings to provide for optimum swap space configuration and performance. Throughout
this series, I'll also cover some of the best practices of memory performance tuning
and monitoring.
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Articles |
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14 Jun 2007 |
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Coming soon to developerWorks AIX and UNIX
See what's coming to the developerWorks AIX and UNIX site.
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14 Jun 2007 |
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Know your regular expressions
You can build and test regular expressions (regexps) on UNIX(R) systems in several
ways. Discover the available tools and techniques that can help you learn how to
construct regular expressions for various programs and languages.
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Articles |
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14 Jun 2007 |
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Develop with Java and PHP technology on AIX Version 5.3, Part 2: Building the Java business application
It is possible to develop applications that employ both Java(TM) and PHP
technology. You can use Java for the core logic (or redeploy an existing Java-based
application), while gaining the benefits of PHP as a Web-based interface platform.
In this tutorial, the second part of a six-part series, create a simple Java
business application and then deploy it as a servlet on the Apache Tomcat
application server on a System p(TM) system with the IBM AIX(R) Version 5.3 operating
system.
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Tutorials |
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05 Jun 2007 |
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Speaking UNIX, Part 10: Customize your shell
You can customize the UNIX(R) shell to save time, to save typing, and to adapt to your
style of work. Shell startup files capture your preferences and recreate your shell
environment session after session, even machine to machine.
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Articles |
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29 May 2007 |
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| |
Developing a file system for AIX
Learn the intricacies of the AIX(R) file system framework. Every operating
system provides a native kernel framework that kernel developers have to understand
and adhere to when developing a piece of a kernel component for that operating
system. This article sheds some light on the AIX file system framework. You need to
understand the framework in order to develop a new file system, or to port an
existing file system to the AIX operating system.
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Articles |
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29 May 2007 |
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Explore powerful UNIX writer's tools
Long ago, UNIX(R) had a proprietary package called the Writer's Workbench
(WWB). Developers, administrators, and technical writers who used to use this
package in their work deeply miss it -- its powerful capabilities made the UNIX
workstation a preferred environment for document editing and proofreading. Today,
many new implementations of those tools are available for all UNIX systems, and you
can also find open source equivalents of the key WWB tools. Discover these tools and
learn how to use them, building a custom style guide checker in the process.
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Tutorials |
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22 May 2007 |
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| |
Linux tip: Bash parameters and parameter expansions
Do you sometimes wonder how to use parameters with your scripts, and how to
pass them to internal functions or other scripts? Do you need to do simple validity
tests on parameters or options, or perform simple extraction and replacement
operations on the parameter strings? This tip helps you with parameter use and the
various parameter expansions available in the bash shell.
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Articles |
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16 May 2007 |
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| |
Writing endian-independent code in C
Architectures, processors, network stacks, and communication protocols all
have to define endianness at some point. This article explains how endianness affects code, how to
determine endianness at run time, and how to write code that can reverse byte order
and free you from being bound to a certain endian.
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Articles |
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15 May 2007 |
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| |
Optimizing AIX 5L performance: Tuning your memory settings, Part 1
This three-part series on memory tuning dives right into tuning parameters,
focusing on the many challenges and the various best practices of optimizing memory
performance, and it also discusses some improvements in AIX(R) Version 5.3. While
memory tuning might be more difficult to implement than Central Processing Unit
(CPU) tuning, it certainly is no less important. You can do more to tune memory on
an AIX server than on any other subsystem. Changing some memory parameters on your
system can increase performance dramatically, particularly when these parameters are
not optimized for the environment which you are running. Part 1 of this series
provides an overview of memory on AIX, including a discussion of virtual memory and
the Virtual Memory Manager (VMM).
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Articles |
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15 May 2007 |
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Optimizing AIX 5L performance: Monitoring your CPU, Part 3
Part 3 of this series focuses on arguably the least understood area of
Central Processing Unit (CPU) performance tuning: controlling thread usage and CPU
binding. This article addresses key tools and utilities you can use to analyze
threads and administrate your processes.
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Articles |
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15 May 2007 |
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| |
Setting up a multicluster environment using General Parallel File System
Learn how to construct and deconstruct a simple multicluster of System
x(TM)and System p(TM) computers using the General Parallel File System (GPFS).
You can remotely add an existing GPFS cluster to another cluster. See how to mount a file system from the remote cluster using the GPFS secure
communication protocol.
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Articles |
|
11 May 2007 |
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| |
Guaranteed porting for a heterogeneous UNIX environment
Use a componentized build system to automatically port Java(TM) projects
with native extensions on heterogeneous UNIX(R) platforms. Today, many large-scale
Java systems running on UNIX-like platforms require third party native library
support, or you have to develop your own native components. Many utilities and
system calls on these platforms do not have corresponding Java wrappers.
Constructing a "Write once, run anywhere" Java application under these environments
requires maintenance of separate native source sets, and integrating a separate
build system for every platform has many shortcomings.
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Articles |
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08 May 2007 |
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| |
Improve your memory programming
Are you tired of spending countless hours devoted to fixing memory faults? Do you
find yourself constantly being bogged down in programs that leak memory, violate memory
bounds, use uninitialized data, and devote an excessive amount of run time to memory
management? Use this article to help you conquer these pesky memory defects.
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Articles |
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04 May 2007 |
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| |
Emacs editing environment, Part 3: Advanced Emacs text operations
This tutorial, the third in a series, builds on what you've learned by
taking you through a tour of some of the more advanced Emacs features for text
operations. You get a hands-on demonstration of advanced editing techniques,
including how to perform a recursive edit, mark and use rectangles of text, and
handle complex selection techniques using the kill ring and the secondary selection.
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Tutorials |
|
01 May 2007 |
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| |
LDAP configuration management and troubleshooting on AIX
Learn how to diagnose IBM Directory Server problems and how to identify what
is needed to resolve the issues. This article is a quick reference for IBM
Directory Server configuration management on AIX(R).
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Articles |
|
01 May 2007 |
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| |
Top ten AIX and UNIX articles and tutorials -- March 2007
See what AIX(R) and UNIX(R) content your peers found most valuable.
|
|
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|
26 Apr 2007 |
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| |
Optimizing AIX 5L performance: Monitoring your CPU, Part 2
Identify which AIX(R) tools to use to monitor your Central Processing Unit
(CPU) for a given situation and find out why some tools might be better than others.
Part 1 of this series discussed the tuning methodology and the importance of having
procedures for CPU performance tuning. It also briefly introduced some performance
tools to use as a part of your tuning repertories, gave an overview of the POWER
CPU, and discussed how the architectural improvements of the evolution of the POWER
Chip have contributed to the hardware improvements of the System p(TM) product line.
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Articles |
|
24 Apr 2007 |
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| |
Optimizing AIX 5L performance: Monitoring your CPU, Part 1
Just when you thought it was going to be an ordinary day, you receive a
phone call and hear the worst six words dreaded by most AIX(R) administrators. Which
of course is, "Why is the system so slow?" If you have done your homework, the
answer to that question is relatively simple.
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Articles |
|
17 Apr 2007 |
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| |
Speaking UNIX, Part 9: Regular expressions
Virtually all non-trivial problems require you to filter good data from bad.
Discover the many UNIX(R) command line utilities that use regular expressions to
discern the relevant from the irrelevant.
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Articles |
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17 Apr 2007 |
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| |
Configure IBM LDAP netgroups with Windows Active Directory server
Netgroups create network-wide groups, and you can use them to provide
special permissions to those groups. Users configured under netgroups can have
different privileges compared to other users. This article explains how to configure
netgroups on the IBM Lightweight Directory Access Protocol (LDAP) client (AIX(R))
with Microsoft Active Directory server.
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Articles |
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10 Apr 2007 |
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Emacs editing environment, Part 2: Learn the essential modes and editing features of Emacs
One of the powerhouses of UNIX computing, the open source Emacs editor is
a large, complex application that does everything from edit text to function as a
complete development environment. This tutorial, the second in a series, introduces
you to some of the essential concept of modes, shows you some of the powerful text
manipulation functions available, and teaches you how to use the built-in search,
replace, and spell check facilities of Emacs.
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Tutorials |
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10 Apr 2007 |
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Techniques for memory debugging
Exercise good memory-related coding practices by creating a comprehensive
program to keep memory errors under control. Memory errors are the bane of C and C++
programming: they're common, awareness of their importance for over two
decades hasn't eradicated them, they can impact applications severely, and
few development teams have a definite plan for their management. The good news,
though, is that they needn't be so mysterious.
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Articles |
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04 Apr 2007 |
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Speaking UNIX, Part 8: UNIX processes
On UNIX(R) systems, each system and end-user task is contained within a
process. The system creates new processes all the time, and processes die when a task
finishes or something unexpected happens. Here, learn how to control processes and
use a number of commands to peer into your system.
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Articles |
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03 Apr 2007 |
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Set up Kerberos Version 5 KDC to use AES encryption
Learn how to set up a Key Distribution Center (KDC) to use Advanced
Encryption Standard (AES) encryption to secure tickets. Developers use KDC in
systems to control the permission for users to access certain services. The KDC uses
tickets as a means to flag permission for accessing a particular service, or for
authenticating users and providers of services.
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Articles |
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03 Apr 2007 |
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Back up and restore your AIX system, Part 2: Implementing your backup strategy and restoration processes
Explore different recovery options to restore your data. Part 2 of this
two-part series shows you how to implement the backup strategy discussed in Part 1.
Part 1 covered the importance of backing up your system, the methods available to
you through the command line, how to use the System Management Interface Tool (SMIT)
to perform backups, and the difference between system data and user data.
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Tutorials |
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27 Mar 2007 |
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State of the VNC art
Virtual Network Computing (VNC) is widely used, but it is also widely
misunderstood. This article carefully outlines both the VNC basics that make it such
a value during daily development and administration chores, along with a few of the
latest VNC advances.
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Articles |
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27 Mar 2007 |
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Emacs editing environment, Part 1: Learn the basics of Emacs
Master the Emacs editor and delve into the depths of its most advanced editing commands that have made it famous. The open source Emacs editor (one of the powerhouses of UNIX(R) computing) is a large, complex application that does everything from editing text to functioning as a complete development environment. It's rich in features and is unlike any other program you're likely to have encountered, especially in the way you specify and input commands. This tutorial, the first in a series, gets you going by providing a concise, hands-on introduction to the most important Emacs editing concepts and features.
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Tutorials |
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20 Mar 2007 |
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Process priority and control on AIX
Managing processes is quite straightforward with tools like kill and nice, but what happens when you want to provide even finer management control over your processes? You can assign processes and threads to specific processors in a multi-processor system using AIX(R), but how do you chose the right applications and organize a larger system in order to optimize the applications appropriately? In this article, discover the tools available to you for organizing your processes, and take a look at the theory behind organizing and choosing processes and how to prioritize effectively.
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Articles |
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20 Mar 2007 |
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Top ten AIX and UNIX articles and tutorials -- January 2007
See what AIX(R) and UNIX(R) content your peers find interesting.
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14 Mar 2007 |
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Rexx and what it means for AIX
Nearly thirty years of growth haven't exhausted the the potential of the REstructured eXtended eXecutor (Rexx) language. The first of the widely used "scripting" languages continues to expand its capabilities and platform range, and it makes for a particularly good match with AIX(R).
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Articles |
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13 Mar 2007 |
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Back up and restore your AIX system, Part 1: The when, why, and how of backing up
Take a look at some of the reasons, methods, and tools for backing up your AIX(R) system. As business and data changes at the speed of light, your systems are at an even greater risk of system corruption and lost data. To protect your company's data, you need to have a solid backup strategy, multiple backups, offsite storage of data, and a fully tested and proven plan of restoring data to your systems. Having a solid backup strategy decreases company downtime.
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Tutorials |
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13 Mar 2007 |
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Transition from Solaris to AIX
So you've been the UNIX(R) guru on your team for years now and senior management has determined, without your input, to migrate to IBM from Sun Microsystems. Other than updating your resume, what do you need to do? Can you make the transition to AIX(R)? What does IBM offer as an alternative to either VERITAS or Solaris Volume Manager (SVM)? In this article, use the filesystem management and tools available to you on AIX to make your transition easier.
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Articles |
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06 Mar 2007 |
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Remote kernel debugging in FreeBSD using serial communication
Explore how to remotely debug a FreeBSD kernel that is running on a target machine without affecting system performance. In this article, examine setting up the debug environment using serial communication port, compiling modified kernel code, debugging, and troubleshooting tips.
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Articles |
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06 Mar 2007 |
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Using AIX accounting
Accounting has been a part of the UNIX(R) operating system since the very early days. Most variants of UNIX have process and connect-time accounting available. As such, it's possible to merge accounting records in a heterogeneous environment for billing or monitoring purposes.
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Tutorials |
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28 Feb 2007 |
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Partition Load Manager logging and monitoring
Accomplish server resource virtualization with the help of the Partition Load Manager. Because the Partition Load Manager reallocates resources dynamically across partitions based on their workload, conventional tools for monitoring and analyzing resources become useless. So, what’s a developer to do? You can use the On-demand Monitoring System (OMS) tool for the Partition Load Manager. It works as an integral component providing real-time and historical utilization and allocation data.
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Articles |
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23 Feb 2007 |
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UNIX tips and tricks for a new user, Part 4: Some nifty shell tricks
When writing a shell program, you often come across some special situation that you'd like to handle automatically. This tutorial includes examples of such situations from small Bourne shell scripts. These situations include base conversion from one string to another (decimal to hex, hex to decimal, decimal to octal, and so on), reading the keyboard while in a piped loop, subshell execution, inline input, executing a command once for each file in a directory, and multiple ways to construct a continuous loop. Part 4 of this series wraps up with a collection of shell one-liners that perform useful functions.
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Tutorials |
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20 Feb 2007 |
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Linux tip: Bash test and comparison functions
Are you confused by the plethora of testing and comparison options in the
Bash shell?
This tip helps you demystify the various types of file, arithmetic, and string tests
so you will always know when to use test, [ ], [[ ]], (( )), or if-then-else
constructs.
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Articles |
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20 Feb 2007 |
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System Administration Toolkit: Set up remote access in UNIX through OpenSSH
Use OpenSSH to provide a secure environment for running a remote terminal. The basics of OpenSSH and terminal usage are quite simple but, in this article, examine additional elements that allow automatic login to remote hosts, methods for running remote applications, and how to securely copy files between hosts.
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Articles |
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13 Feb 2007 |
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Linux tip: Printing DVI files with CUPS
Have you ever tried to print DVI or other files in Linux and gotten an
"unsupported format" message? This tip shows you how to combine existing
tools to make a CUPS print filter for printing DVI files.
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Articles |
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07 Feb 2007 |
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Securing the Hardware Management Console
Get step-by-step instructions for things you should do during installation of the Hardware Management Console (HMC), measures you can take after installation, and maintenance guidelines to ensure that a secure system stays secure. The HMC, which plays a central role in the IBM virtualization strategy, controls hardware, configures logical partitions (LPAR), and assigns both physical and virtual devices. It is vital to systems management in a virtualized environment.
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Articles |
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06 Feb 2007 |
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Speaking UNIX, Part 7: Command-line locution
UNIX(R) has a dialect all its own, and its vocabulary of commands is quite large. But you don't have to learn everything all at once. Here, discover more command-line combinations and expand your mastery of the UNIX language.
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Articles |
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06 Feb 2007 |
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Mathematics on a UNIX workstation
Many tools are available for use on UNIX(R) that can satisfy your quest for mathematical enlightenment. Some are built in; most are just a download away. This article shows you the way to mathematical nirvana on a UNIX workstation.
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Articles |
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02 Feb 2007 |
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Create uniform namespace using autofs with NFS Version 3 clients and servers
Do you have trouble accessing data exported from multiple file servers? If so, try using open source implementations of autofs and Lightweight Directory Access Protocol (LDAP), with Network File System (NFS) Version 3, to access data under the same global mount point. In this article, study and compare five different methods to create a uniform namespace using autofs. A handy table with a comparative evaluation is available to help you choose the best technique for your scenario.
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Articles |
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30 Jan 2007 |
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DB2 9 XML performance characteristics
Learn about the performance and scalability characteristics of a simulated securities brokerage transaction processing environment using DB2 9 XML, IBM POWER5+, AIX 5.3, and TotalStorage DS8100. This scenario includes use of the FIXML schema, a financial industry standard.
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Articles |
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30 Jan 2007 |
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Share application data with UNIX System V IPC mechanisms
The UNIX(R) operating system provides a rich set of features that allows processes to communicate with each other. Known as Inter-Process Communication (IPC), you can use this communication method to reconfigure an application at run time or to share data between different processes that are running in parallel. This article teaches you how to identify the methods that applications can use to communicate with each other, select the most appropriate method for your application, and begin your implementation.
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Articles |
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30 Jan 2007 |
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Introduction to extending SMIT
The AIX(R) System Management Interface Tool (SMIT) is a menu application to aid you in performing various system administration tasks. This article is intended for experienced AIX administrators, familiar with shell programming, smit(1), and smitty(1), who wish to add to or otherwise modify SMIT. The ability to use a UNIX(R) text editor is assumed.
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Articles |
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23 Jan 2007 |
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Avoid traps when porting Java Web applications from Windows to AIX
Examine three traps you could fall in when porting Java(TM) Web applications from Windows(R) to AIX(R), and learn how to maneuver around them. When developing applications, you normally do so in a development environment and then deploy to a production environment. If you develop on Windows and deploy to a UNIX(R)-like platform, you might encounter subtle pitfalls. The first trap sets up different line separators in Windows and AIX, the second shows the best approach to locate a file in different development environments and operating systems, and the third is a common exception in socket communication.
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Articles |
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23 Jan 2007 |
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Save time with text editing one-liners
Take a quick look at some essential editing one-liners that can save you time and effort. Text-editing operations are normally done interactively, inside a text editor application. Some tasks, however, can be accomplished quickly and easily, right from the UNIX(R) command line. What's more, these one-liners can be used in scripts to automate various editing procedures.
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Articles |
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16 Jan 2007 |
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Take logical partitioning in the p5 environment to the next level
Learn how to configure a p5 server to provide redundancy and recoverability in a production environment. In a previous article, you examined the basics of how to set up logical partitioning on a p5 server. This included the creation of one Virtual I/O Server (VIO Server) and one logical partition (LPAR), which used the VIO Server for its rootvg and Ethernet connection.
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Articles |
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09 Jan 2007 |
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Training
Start here to find the tutorials and courses you need to stay up-to-date with AIX and UNIX application development and system administration.
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03 Jan 2007 |
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Delve into UNIX process creation
Examine the life cycle of a process so that you can relate what you see happening on your system to what's going on within the kernel. System administrators must know how processes are created and destroyed within the UNIX(R) environment in order to understand how the system fits together and how to manage misbehaving processes. Similarly, developers must understand the UNIX processes model in order to write solid applications that run unattended and won't cause problems for system administrators.
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Articles |
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03 Jan 2007 |
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Speaking UNIX, Part 6: Automate, automate, automate!
Discover how shell scripts can mechanize virtually any personal or system task. Scripts can monitor, archive, update, report, upload, and download. Indeed, no job is too small or too great for a script. Here's an introduction.
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Articles |
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03 Jan 2007 |
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AIX 5L LDAP user management
Get an overview of the Lightweight Directory Access Protocol- (LDAP) related enhancements in the AIX 5L(TM) operating system V5.3 TL5 update. Some of the enhancements include support for Active Directory, multiple base distinguished (DN) support, and extended base DN format.
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Articles |
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27 Dec 2006 |
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IBM Cluster Systems Management: Installing the Webmin tool for Web access
Learn to install and use the Webmin UNIX(R) system administration tool so you can use a standard Web interface to remotely manage a clustered environment This article is an update to the 2005 developerWorks article about the IBM Cluster Systems Management tool.
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Articles |
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22 Dec 2006 |
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System Administration Toolkit: Get the most out of zsh
Examine key parts of the Z shell (zsh) and how to use it's features to ease your UNIX(R) system administration tasks. zsh is a popular alternative to the original Bourne and Korn shells. It provides an impressive range of additional functionality, including improvements for completing different commands, files, and paths automatically, and for binding keys to functions and operations.
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Articles |
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19 Dec 2006 |
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UNIX tips: Learn 10 good UNIX usage habits
Adopt 10 good habits that improve your UNIX(R) command line productivity -- and
break away from bad usage patterns in the process. This article takes you step-by-step
through several good, but too often neglected, techniques for command-line operations.
Learn about common errors and how to overcome them, so you can learn exactly why
these UNIX habits are worth picking up.
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Articles |
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12 Dec 2006 |
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System Administration Toolkit: Get the most out of bash
Ease your system administration tasks by taking advantage of key parts of the Bourne-again shell (bash) and its features. Bash is a popular alternative to the original Bourne and Korn shells. It provides an impressive range of additional functionality that includes improvements to the scripting environment, extensive aliasing techniques, and improved methods for automatically completing different commands, files, and paths.
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Articles |
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12 Dec 2006 |
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UNIX tips and tricks for a new user, Part 3: Introducing filters and regular expressions
Discover the power of UNIX(R) filters. In this tutorial, you'll learn about the grep family in depth, including the syntax of regular expressions in many UNIX utilities. You'll also find out more about the stream editor, sed, as well as examine the awk pattern scanning language through examples and explanations.
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Tutorials |
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05 Dec 2006 |
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Kerberos authentication for AIX Version 5.3 Network File System Version 4
Find out how to use application programming interfaces (APIs) when writing your own custom Kerberos-based authentication applications. Network File System Version 4 (NFS V4), the up and coming enterprise file system, uses the Kerberos security mechanism to address privacy, authentication, and integrity requirements. In this article, you'll examine different Kerberos credential cache name formats that AIX(R) NFS V4 supports and are required for authentication purposes. You'll also look at different methods of obtaining the Kerberos credential.
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Articles |
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05 Dec 2006 |
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Network interface operations for IPv4 and IPv6 on AIX Version 5.3
Learn more about the socket I/O control (ioctl) commands and how to use them to perform various network-related operations. Operating systems provide control operations for sockets, routing tables, ARP tables, global network parameters, and interfaces. This article is for developers on AIX Version 5.3 with an interest in network-level operations for both Internet Protocol version 4 (IPv4) and the Internet Protocol version 6 (IPv6) stack.
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Articles |
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29 Nov 2006 |
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Speaking UNIX, Part 5: Data, data everywhere
Take a look at several techniques that illustrate how to move files among systems and how to keep such far-flung data in sync.
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Articles |
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28 Nov 2006 |
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AIX 5L Version 5.3: What's in it for you?
Learn what features you can benefit from in AIX 5L(TM) Version 5.3. With guaranteed binary compatibility with the previous releases on the one hand and support for advanced technologies such as Virtual SCSI, Virtual Ethernet, Micro-Partitioning(TM), and Simultaneous Multi-Threading (SMT) on the other, AIX 5L continues to empower users and developers with flexible, reliable, and powerful tools to interoperate smoothly across different IT environments.
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Articles |
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22 Nov 2006 |
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UNIX tools for exploring object files
The programs that run on a UNIX(R) system follow a careful design known as the object file format. Learn more about the object file format and the tools that you can use for exploring object files found on your system.
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Articles |
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21 Nov 2006 |
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Update your AIX system with SUMA
Learn how the Service Update Management Assistant (SUMA), a feature first introduced in AIX 5L(TM) Version 5.3, automates the update process for AIX(R) systems. We'll also examine issues surrounding AIX updates and how to implement specific steps to overcome them.
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Articles |
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17 Nov 2006 |
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Processor affinity on AIX
Learn how to use processor affinity to restrict a process and run it only on a specified central processing unit (CPU). Processor affinity is a facility provided by operating systems, and you can use it on multi-processor hardware. All the threads within the process can be bound to run on the specified processor. Using process affinity settings to bind or unbind threads can help you find the root cause of troublesome hang or deadlock problems, especially for those hairy deadlocks and hangs that are hard to debug.
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Articles |
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16 Nov 2006 |
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Storage Management in AIX 5L Version 5.3
AIX 5L(TM) Version 5.3 has incorporated a number of features that make it functionally much more powerful than prior releases of the operating system. IBM(R) consultant Shiv Dutta focuses on some of the features that have been introduced in AIX 5L Version 5.3 to enhance the scope, functionality, and performance of the Logical Volume Manager (LVM) and Enhanced Journal File System (JFS2).
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Articles |
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16 Nov 2006 |
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System Administration Toolkit: Problems and pitfalls
Avoid common pitfalls and traps to help keep your systems running smoothly. Knowing the right way of dealing with full disks, or a crippled system, is nearly as important as having tools in your arsenal to make sure you're prepared to react quickly to missing files or an insecure system. This article focuses on some of the most common problems and issues facing UNIX(R) administrators and ways to achieve a safe and effective resolution.
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Articles |
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14 Nov 2006 |
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UNIX tips and tricks for a new user, Part 2: The vi text editor
The vi text editor might seem counterintuitive to new users but, make no mistake, there is a good reason this 30-year old tool is still widely used by many of the best developers in the world. The vi text editor separates operations into insert mode and command mode, which gives you ultrafast access to key commands that can edit, insert, and move text in on-the-fly, user-defined segments.
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Tutorials |
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07 Nov 2006 |
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Secure Kerberized authentication on Solaris 10 using IBM AIX Version 5.3
Set up a Kerberized environment to work with Solaris(TM) 10 and learn how to configure a Key Distribution Center (KDC) on AIX(R) Version 5.3. You'll also run through a series of steps for configuring a Kerberos client on Solaris 10 to authenticate users for Telnet, remote shell (rsh), and Secure Shell (SSH) using AIX Version 5.3 as your KDC. Having a single IBM Network Authentication Service (NAS) KDC on AIX for authentication across different platforms is especially helpful in a hybrid environment.
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Articles |
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07 Nov 2006 |
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System Administration Toolkit: Swap space management and tricks
Configure your swap space (including adding space in an emergency) to get the most out of your system. In this article, you'll learn how to monitor your system to determine an effective swap space figure as well as examine methods for using swap space for more than just secondary random access memory (RAM).
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Articles |
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31 Oct 2006 |
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Pointers and memory leaks in C
When working with C, are you tired of spending time debugging problems with pointers and memory leaks? If so, then this article is for you. You'll learn about the types of pointer operations that can cause memory corruption and you'll also examine some scenarios that show what to consider while working with dynamic memory allocation.
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Articles |
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26 Oct 2006 |
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AIX commands you should not leave home without
Do you ever feel you wish you could answer some of your own questions when you work with AIX(R) and your System p(TM) server? Do you ever feel you could save time by not having to call on the support professionals all the time? Well, wish no more. Shiv Dutta discusses some of the AIX commands that answer those questions and tells you how to enlarge the list of such answers.
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Articles |
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24 Oct 2006 |
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Tunneling with SSH
Use OpenSource tools, such as Secure Shell (SSH), PuTTY, and Cygwin, to create secure connections to almost any resource you need to access. Current information on SSH tunneling and setup is fragmented and limited to specific applications, or it is written at a system administrator's level. With increasing security needs, the addition of boundary firewalls, and tightening of the number of allowed network ports, users need a method that is simple to configure, easy to operate and, above all, secure to accomplish day-to-day tasks and access the services that they have become accustomed to. This article describes the setup of a simple SSH client connecting to an AIX(R)- or Linux(R)-based SSH server that allows a typical, technically literate individual the ability to set up, configure, and operate a flexible means of tunneling data and services over the SSH service.
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Articles |
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17 Oct 2006 |
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Speaking UNIX, Part 4: UNIX ownership and permissions provide for privacy and participation
Learn how to manipulate file permissions to protect your files, or share them with others.
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Articles |
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17 Oct 2006 |
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Logical partitioning in the System p5 environment
Learn the basics of how to partition an IBM System p5 server. If your shop is similar to ours, then maybe you're frustrated with having scores of underutilized servers consuming valuable floor space in your data center -- servers that are dedicated to only one application using only a small fraction of the expensive CPU and memory resources. Wouldn't it be nice to consolidate all of those servers onto just a few pieces of hardware to more fully utilize your resources and yet still maintain separate OS environments for each of the applications? With the IBM POWER5-based servers, you can do just that.
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Articles |
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11 Oct 2006 |
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UNIX tips: Become a better blogger with UNIX
Did you know that blogging and UNIX(R) go hand in hand? The native Web and text-processing tools of UNIX enable you to create your blogs quickly and easily. Discover some handy tips for improving your UNIX blogging skills.
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Articles |
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10 Oct 2006 |
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GNU Project Debugger: More fun with GDB
GDB, the GNU Project Debugger, has a macro capability that is sophisticated
and allows you to personalize and customize GDB to have just
the tools you need. The mechanism for providing help documentation
on your customized commands makes it an easy tool to share with others
as well.
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Articles |
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03 Oct 2006 |
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UNIX tips and tricks for a new user, Part 1: File maintenance tools
Systems administrators can use a number of programs to maintain files in a UNIX(R) system from the command line. In this tutorial, you'll
experiment with commands, such as cd, cp, and tar, to navigate a UNIX file system from the command line and work with files and directories. The cd command changes directories, cp duplicates files or directories, and tar quickly groups files into an archive. You'll also learn how to deal with file permissions and perform simple input/output.
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Tutorials |
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26 Sep 2006 |
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Introducing SMIT
Get an introduction to SMIT and how it's used. The System Management Interface Tool (SMIT) is an interactive application that simplifies virtually every aspect of AIX(R) system administration. By the end of this article, you'll agree that SMIT is the AIX systems administrator's best friend.
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Articles |
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26 Sep 2006 |
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OpenSSH is now bundled with AIX
OpenSSH is a free software tool that supports SSH1 and SSH2 protocols. It's reliable and secure and is widely accepted in the IT industry to replace the r-commands, telnet, and ftp services, providing secure encrypted sessions between two hosts over the network. Now it's easy to get OpenSSH already compiled and ready to install on AIX.
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Articles |
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25 Sep 2006 |
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Run commands sequentially across a cluster from a UNIX server, Part 1: Secure Shell (SSH)
Configure Secure Shell (SSH) on IBM System p(TM) and System x(TM) computers so the UNIX(R) server can access a remote server without a password.
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Articles |
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21 Sep 2006 |
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UNIX tips: Productivity tips
Using UNIX(R) in a day-to-day office setting doesn't have to be clumsy. Learn some of the many ways, both simple and complex, to use the power of the UNIX shell and available system tools to greatly increase your productivity in the office.
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Articles |
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21 Sep 2006 |
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Run commands sequentially across a cluster from a UNIX server, Part 2: Remote shell (rsh)
Find out how to configure remote shell (rsh) on IBM System p(TM) and System x(TM) computers so that the UNIX(R) server can access a remote server without a password.
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Articles |
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20 Sep 2006 |
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Get started with GAWK: AWK language fundamentals
Discover the basic concepts of the AWK text-processing and pattern-scanning language. This tutorial gets you started programming in AWK: You'll learn how AWK reads and sorts its input data, run AWK programs, manipulate data, and perform complex pattern matching. When you're finished, you'll also understand GNU AWK (GAWK).
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Tutorials |
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19 Sep 2006 |
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Implement iSCSI on AIX
Learn how to implement Internet small computer system interface (iSCSI) on AIX(R). The step-by-step procedures show you how to implement iSCSI on an AIX host across a storage area network (SAN) through Cisco MDS. Some interface tuning parameters are also included.
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Articles |
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13 Sep 2006 |
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Use alternative methods to manage and monitor your UNIX servers
Make your systems and environment easier to use and administer by using tools, such as a Weblog, wiki, and Subversion, to record and track information and changes to your IT infrastructure. During the course of your UNIX(R) administration, you need to store and retain many different types of information and data. There are many ways of doing this, but one of the more radical solutions is to use a variety of free tools for the storage and retention of configuration data, configuration and administration change, and administration events.
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Tutorials |
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12 Sep 2006 |
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Speaking UNIX, Part 3: Do everything right from the command line
Discover three essential UNIX(R) utilities that deliver the entire Internet to your command line.
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Articles |
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05 Sep 2006 |
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Errors: errno in UNIX programs
Learn more than you ever wanted to know about the UNIX standard error reporting mechanism, the errno global variable. You'll also learn about a couple of associated global variables (sys_nerr and sys_errlist) and the standard functions that help you report errors to the user.
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Articles |
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05 Sep 2006 |
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Get to know NetBSD
NetBSD runs on more hardware platforms than any other UNIX(R) derivative due to smart
design decisions and a commitment to portable code. Whether you're porting an operating
system to a proprietary embedded system or looking for stability and compatibility across
hardware platforms in the lab, NetBSD and its open license is a compelling alternative to
Linux(R) and the GNU Public License (GPL).
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Articles |
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29 Aug 2006 |
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System Administration Toolkit: Standardizing your UNIX command-line tools
Examine methods for standardizing your interface to simplify movements between different UNIX(R) systems. If you manage multiple UNIX systems, particularly in a heterogeneous environment, then the hardest task can be switching between the different environments and performing the different tasks while having to consider all of the differences between the systems. This article does not cover specific differences, but you'll look at ways that can provide compatible layers, or wrappers, to support a consistent environment.
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22 Aug 2006 |
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Kerberized authentication of Windows Terminal Service
Discover how to configure the Microsoft(R) Windows(R) 2003 Server to authenticate Terminal Service users with the IBM Network Authentication Service (IBM NAS) Key Distribution Center (KDC) being hosted on their AIX(R) 5.3 system. Such a setup not only gives Kerberized authentication for Terminal Service users, but it also allows users to have uniform user IDs and passwords across AIX and Windows Server systems. It allows application developers to exploit the advantages of Kerberos interoperability between IBM NAS and Windows in Kerberized applications spanning across systems.
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22 Aug 2006 |
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System Administration Toolkit: Backing up key information
Most UNIX(R) administrators have processes in place to back up the data and information on their UNIX machines, but what about the configuration files and other elements that provide the configuration data your machines need to operate? This article provides detailed information on techniques for achieving an effective and efficient backup system for these key files.
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15 Aug 2006 |
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Writing AIX kernel extensions
Learn how to use the AIX kernel to build routines to extend functions and create your own system calls, kernel processes, or file systems. The rapid improvements in Power architecture, combined with the enhancements of AIX(R) Version 5.3, have caused more interest than ever in AIX. This article shows you, with extensive examples, how to tap into the power of kernel extensions on AIX.
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15 Aug 2006 |
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Speaking UNIX, Part 2: Working smarter, not harder
Learn how to leverage the many shortcuts that the UNIX(R) shell provides. With a little practice,
you'll work smarter, not harder.
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08 Aug 2006 |
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Take a closer look at OpenBSD
OpenBSD is quite possibly the most secure operating system on the planet. Every step of the
development process focuses on building a secure, open, and free platform. UNIX(R) and Linux(R)
administrators take note: Without realizing it, you probably use tools ported from OpenBSD every day.
Maybe it's time to give the whole operating system a closer look.
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08 Aug 2006 |
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Text processing with UNIX
The origin of UNIX(R) lies in simple text processing, and its command-line environment remains one of the most powerful text processing tools available. By combining a series of simple commands to make up a complex text transformation, the tools available from UNIX let you build nearly any text processing engine you could need.
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01 Aug 2006 |
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System Administration Toolkit: Managing NIS services for authorizations
Examine how to set up, configure, and update a Network Information System (NIS) installation for sharing information, and learn how NIS can be merged with other solutions, such as files and Domain Name System (DNS), to provide subnet, network, and worldwide data sharing facilities. In a large UNIX(R) network, the ability to share information among the many systems helps to alleviate many problems, such as sharing permissions across different systems with Network File System (NFS), or simply providing a single login for the entire network.
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Articles |
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01 Aug 2006 |
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Quantify performance changes using application tracing
Use the Apache Web server as an example to see how to analyze common configurations for their performance implications. Application tracing watches the system calls made by an application as it runs. By counting the calls and the time they take, you can readily see the impact of performance changes.
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25 Jul 2006 |
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System Administration Toolkit: Migrating and moving UNIX directory trees
Occasionally, you need to copy around an entire UNIX(R) directory tree, either between areas on the same system or between different systems. There are many different methods of achieving this, but not all preserve the right amount of information or are compatible across different systems. This article discusses the various options available for UNIX and how best to make them work.
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25 Jul 2006 |
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Finding open files with lsof
Learn more about your system by seeing which files are open. Knowing which files an application has open, or which application has a particular file open, enables you to make better decisions as a system administrator. For instance, you shouldn't unmount a file system while files on it are open. Using lsof, you can check for open files and stopped processes before unmounting, as needed. Likewise, if you find an unknown file, you can find the application holding it open.
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25 Jul 2006 |
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Hone your regexp pattern-building skills
Add to your bag of tricks several handy techniques for crafting real-world regular expressions (regexps). Building regexps is a part of the daily life of any administrator. Learning to think in terms of pattern matching, in order to construct successful regexps that return the desired criteria, is a skill that takes both time and practice.
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Articles |
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18 Jul 2006 |
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Multipurpose multimedia processing with GStreamer
This article introduces you to GStreamer, a universal multimedia processing library that makes multimedia handling easy.
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11 Jul 2006 |
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AIX system identification
The generation of unique system identifiers is important in todayâs multisystem, multipartition IT environments. A license key manager is just one example in which a unique system identifier is used to calculate a license key. With the introduction of servers based on the IBM POWER4 and POWER5 processors from IBM Systems, the high number of maximum partitions, dedicated and shared, is a welcomed feature.
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11 Jul 2006 |
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System Administration Toolkit: Migrating and moving UNIX filesystems
Learn how to transfer an entire file system on a live system, including how to create, copy, and re-enable the new file system. If you have a UNIX(R) disk or system failure or simply fill up your file system, then you need to create a new partition and file system and copy over the contents. You might even need to mount the new partition in place to preserve the location of vital files and components. To add further complications, you need to do this on a live system, where you'd need to preserve file permissions, ownership, and possibly named pipes and other components. Effectively transferring these components and retaining all of this information is a vital part of the migration process.
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Articles |
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03 Jul 2006 |
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Produce device-independent documentation with Groff
Groff (GNU Troff) is the latest open source implementation of Troff, a document-preparation system that generates print and screen documents for various devices from the same input source. Get an introduction to the Groff system and learn how you can use it for preparing your documentation, help systems, reports, or any printed output where professional quality, portability, and support for multiple output formats are desired.
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Tutorials |
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27 Jun 2006 |
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Robust internationalization with GTK+
Learn how to use the GTK+ library to create graphical user interface (GUI) applications that are useful in multiple languages and in different parts of the world. This article shows you how to avoid common mistakes and create applications that can robustly handle international needs.
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20 Jun 2006 |
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FIT and Eclipse: Developing the Extended FIT Eclipse plug-in
Learn basic Eclipse architectural concepts and, through the use of a custom plug-in, discover how to implement your own Eclipse plug-in. This article is the second in a two-part series designed to show you how to use the Framework for Integrated Tests (FIT) in an Eclipse-based environment.
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20 Jun 2006 |
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System Administration Toolkit: Monitoring disk space and usage
Look at methods for determining disk usage across multiple UNIX(R) systems and how to create a simple warning system to alert you of potential problems. Keeping an eye on your file systems and ensuring they don't fill up is a trivial, but vital, process in the day-to-day management of your UNIX systems. In this article, you'll look at methods for keeping an eye on disk space, discovering which files, users, or applications are using up the most space, and how to make use of quotas and other solutions to find the information you need.
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13 Jun 2006 |
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Secure communication with Kerberized OpenSSH on AIX Version 5.3 using Windows Kerberos service
Discover how you can configure the Kerberized Open Secure Shell (OpenSSH) on AIX(R) Version 5.3 machines that have Microsoft(R) Active Directory Server to act as the Key Distribution Center (KDC). OpenSSH encrypts traffic, including passwords, to eliminate eavesdropping, taking over your connection, or peeking into your data. If you work in a hybrid environment with multi-vendor solutions on AIX Version 5.3 systems, then you'll find this article extremely useful.
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13 Jun 2006 |
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System Administration Toolkit: Monitoring a slow system
When your UNIX(R) system runs slow, it is vital that you discover what the problem is as quickly as possible so you can get your system back into the normal operating mode. There are many causes for a slow system, but actually identifying the problem can be exceedingly difficult. In this article, study examples of how to identify and diagnose the cause of your slow running UNIX system to get your machine running properly again.
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Articles |
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07 Jun 2006 |
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Tcl your desktop
Most graphical user interface (GUI) desktops provide you with a good set of configuration options. Script your way to a set of GUI widgets that go beyond what the desktop normally does.
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06 Jun 2006 |
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Write text parsers with yacc and lex
Examine the processes behind building a parser using the lex/flex and yacc/bison tools, first to build a simple calculator and then delve into how you can adopt the same principles for text parsing. Parsing text -- that is, understanding and extracting the key parts of the text -- is an important part of many applications. Within UNIX(R), many elements of the operating system rely on parsing text, from the shell you use to interact with the system, through to common tools and commands like awk or Perl, right through to the C compiler you use to build software and applications.
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Tutorials |
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31 May 2006 |
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FIT and Eclipse: Testing with the Extended FIT Eclipse plug-in
Learn the basic Framework for Integrated Tests (FIT) concepts and, through the use of the Extended FIT Eclipse plug-in, begin the process of testing FIT tables for Eclipse developers. This article, the first in a two-part series, introduces you to FIT and shows you how to use it within an Eclipse-based environment.
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30 May 2006 |
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Working in the bash shell
Get an introduction to the Bash shell, which you can use on nearly any UNIX(R)-based operating system. Bash is a mature, powerful, yet easy-to-use shell that is freely available. This tutorial provides a brief history of Bash, which indicates how the Bash shell is different than some of the other popular UNIX shells, and also provides an overview of the major features available within Bash. Next, you'll learn more about the UNIX file system, how to work with both directories and files, and several methods for customizing the appearance and behavior of Bash. Finally, the tutorial concludes with a discussion of the job control functionality of Bash.
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Tutorials |
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30 May 2006 |
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Basic UNIX filesystem operations
Take advantage of the readdir() and stat() functions to run through the entries of a directory. Because of the plethora of files and directories on a UNIX(R) system, you're going to need to know how to process directory entries using the readdir() function and extract information about those entries using the stat() function. These basic file system operations can serve you well in your UNIX programming career, allowing you to easily discover and read files, directories, and symbolic links on your UNIX system.
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Articles |
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23 May 2006 |
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Config file processing with LibXML2
Discover how to use XML (Extensible Markup Language) in your UNIX(R) applications. This article, for UNIX developers who are unfamiliar with XML, explores the XML libraries developed by the Gnome project. After briefly explaining XML in general, you'll examine example code that a UNIX application developer might use to parse and manage configuration files that are in the XML format using the LibXML2 libraries.
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Articles |
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23 May 2006 |
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Fun with strace and the GDB Debugger
Programming a UNIX system can be fun as well as educational. With the UNIX strace tool and GDB, the GNU Project Debugger, you can really dig deep into the functionality of your system and learn a lot about the various programs that comprise it. Using both tools in concert can be a rewarding experience as you look under the hood of your UNIX machine.
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Articles |
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11 May 2006 |
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How to dual boot AIX and Linux in a clustering environment
Learn useful techniques for making the most out of limited processing resources.
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Articles |
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05 May 2006 |
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Performance tuning UNIX systems
Be nice to your computers and examine some general guidelines for tuning server performance. A computer is like an employee who does tasks for you -- it's a good idea to keep from overburdening them. One way to keep this from happening is to carefully tune the processes that run on it. This article provides some simple performance tuning steps using the UNIX nice commands.
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Articles |
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03 May 2006 |
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Command-line processing with getopt()
All UNIX(R) programs, even those with graphical user interfaces (GUIs), accept and process command-line options. For some programs, this is the primary means of interacting with either other programs, or users. Having robust handling of complex command-line arguments makes your application better and more useful. And yet, many developers are spending their precious time writing their own command-line parsers instead of using getopt(), a library function designed specifically to ease the burden of command-line processing. Read on to learn how to use getopt() to record your command-line arguments in a global structure that can then be used throughout your program whenever appropriate.
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Articles |
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02 May 2006 |
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System Administration Toolkit: Time and event management
Automating your administration tasks can save you a lot of time, and UNIX(R) incorporates systems to automate the process for you. In this article, you'll look at the best methods for using these systems, including how to monitor and track their execution and output and how to schedule complex events.
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Articles |
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02 May 2006 |
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Network File System Version 4 security: Kerberos and LIPKEY mechanisms
Use the enriched security features of Network File System (NFS) Version 4 to pave your way to public key technology. In this article, you'll examine the NFS Version 4 built-in security schemes, and how to use the existing Kerberos authentication database in a LIPKEY security mechanism. You'll also find out how to take the first steps for a migration or extension from Kerberos to the LIPKEY security mechanism.
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Articles |
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26 Apr 2006 |
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Rapid application development with GTK+ bindings
Discover options for accelerating your GTK+ development with language bindings. In this article, you'll get an introduction to the languages and tools available for faster creation of high-quality applications.
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25 Apr 2006 |
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nmon analyser -- A free tool to produce AIX performance reports
Searching for an easy way to create high-quality graphs that you can print, publish to the Web, or cut and paste into performance reports? Look no further. The nmon_analyser tool takes files produced by the NMON performance tool, turns them into Microsoft Excel spreadsheets, and automatically produces these graphs.
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Articles |
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19 Apr 2006 |
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Make UNIX and Linux work together
Examine how to use the Network Information Service (NIS) to share core databases between Linux(R) and UNIX(R), and how to use the Network File System (NFS) to share file systems, both with direct links and through the automounter. Although UNIX and Linux are similar, there are some differences between the two that can complicate the process of integrating the two systems. Both, for example, share the same authentication system, but most systems are also standalone. Sharing this authentication information enables you to provide a single sign-on (SSO) functionality to any of the servers in your network.
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Articles |
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18 Apr 2006 |
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Make UNIX work with Windows XP and Mac OS X
Learn about using a UNIX(R) system as a primary domain controller (PDC) and file repository, including an anonymous, read-only shared area accessible by anyone with a Web browser. To be a good citizen on your local network, you need to integrate your favorite UNIX system with the networking features of client systems, generally running Windows(R) XP or Mac OS X. This makes it easier for the users of those workstations to take advantage of the centralized authentication and storage facilities you can provide.
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Articles |
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18 Apr 2006 |
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AIX updates Version 3: How to work the puzzle
Perhaps no other aspect of AIX(R) generates as much confusion as AIX updates. AIX users constantly struggle with questions, such as: What's a program temporary fix (PTF)? What's an authorized program analysis report (APAR)? Am I running the latest Maintenance Level (ML) or Technology Level (TL)? What is the latest ML or TL? By understanding the answers to these questions, you learn how to discover, install, and use AIX updates.
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Articles |
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11 Apr 2006 |
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Using ReiserFS with Linux
Take a look at the ext2 (second extended file system), ext3 (third extended file system), and Reiser4 file systems and discover how to create your own Reiser4 file system. The most commonly used file system, ext2, is a traditional UNIX(R)-style file system that doesn't mix well with modern hard drive sizes. The ext3 file system adds journalling, but not much else. If you want something really advanced, you might want to check out the current Reiser4 file system.
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Articles |
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04 Apr 2006 |
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Retool your Linux skills for commercial UNIX
Examine how to best migrate your Linux(R) skills to take advantage of AIX(R) and Solaris. Linux is all the rage, but what if you have experience in Linux and need to apply it to a commercial UNIX(R) environment? UNIX and Linux are similar, and many of the same principles exist; there is a shell, root is still all powerful, and many of the tools and applications are the same. But how do you cope with understanding the nuances and differences?
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Tutorials |
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30 Mar 2006 |
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Advanced techniques for using the UNIX find command
Explore the vast terrain of the UNIX(R) file system with the find command. One of the most powerful and useful commands in the UNIX programmer's repertoire is find. All flavors of UNIX have file systems that can contain thousands of files of many different types. With so many choices, locating a specific file, or set of files, can be difficult. The find command makes this task easier in many ways.
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Articles |
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28 Mar 2006 |
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Expose Web performance problems with the RRDtool
Examine how to determine the root cause of Web performance problems. Without proper measurement, how do you know whether your Web application is performing well? By using open source tools such as the RRDtool, you can graph the key performance measurements of any Web application, use these graphs to determine the impact of changes in the environment, or point to changes that need addressing.
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Tutorials |
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21 Mar 2006 |
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Solve application problems with tracing
Peer into the behavior of an application with truss. When an application doesn't work as expected, you typically look at application and system logs as a first recourse. But when logs don't help, UNIX(R) provides a powerful set of tools that you can use to trace the application while it runs. Armed with these traces and a bit of knowledge about UNIX, you can easily solve your application problems.
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Articles |
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21 Mar 2006 |
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Client/server programming using the Transport Driver Interface (TDI)
Examine implementation details for programming a client/server application at a kernel level using the Windows(R) Transport Driver Interface (TDI). In this tutorial, you'll get an introduction to the commonly used TDIs, get step-by-step instructions in writing a TDI user datagram protocol (UDP) application, and learn how to port TDI UDP Internet Protocol Version 4 (IPV4) modules to Internet Protocol Version 6 (IPV6).
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Tutorials |
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14 Mar 2006 |
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Build UNIX software with Eclipse
Become more productive with your own code and others by utilizing Eclipse's syntax highlighting, code completion, and other amenities. Eclipse is an excellent open source IDE and has many helpful features. It runs on any UNIX(R) platform with a Java(TM) Runtime Environment (JRE) (Version 1.4 or newer) and an SWT port, such as Linux(R), Solaris, AIX(R), and HP-UX. It's easy enough to start a new project using Eclipse or to import an existing Eclipse project, but how do you bring existing code into the IDE? And what if you need to get an existing project compiling right away without modifying its existing makefile or configure script -- the most common ways of building UNIX software? Read along for the answer to all of these questions.
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Articles |
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14 Mar 2006 |
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Differentiating UNIX and Linux
Investigate the areas where UNIX(R) and Linux(R) converge in terms of functionality, environment, usability, and also those areas where UNIX and Linux differ. Many refer to Linux as a UNIX-like operating system. It is an open source operating system that has many of the same principles and ideals as UNIX, but it is not a true UNIX operating system like Solaris, AIX(R), HP-UX, and others. This article covers a range of aspects, from the core technical elements, such as kernel and filesystem support, to application tools, availability, and the differences in how to administer them.
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14 Mar 2006 |
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Effective management of system logs
Provide solid information resources to decision makers. Discover a simple, but useful, application of the combined processing capabilities of awk and XML that you can use to present UNIX(R) system data in a reader-friendly form suitable for posting to the company intranet or Internet. UNIX generates useful system performance, usage, cost, and related data that management and other interested stakeholders can use.
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Articles |
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07 Mar 2006 |
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Speaking UNIX, Part 1: Command the power of the command line
Learn the basics of the UNIX shell and discover how you can use the command line to combine the finite set of UNIX utilities into innumerable data transforms.
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Articles |
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07 Mar 2006 |
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Easy system monitoring with SAR
Learn how to correlate user complaints with the system activity reporter (SAR) and build a performance baseline for trending purposes using SAR logs. SAR is the perfect tool for systems administrators. It captures important system performance metrics at periodic intervals.
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Articles |
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28 Feb 2006 |
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IBM NFS/DFS Authentication Gateway: Commands and APIs to bridge to NFS Version 4
Learn how to use the IBM NFS/DFS Authentication Gateway commands and application programming interface (APIs) to design applications during migration. As the storage needs of large enterprises continue to grow and NFS implementations offering more and more features, it makes business sense for enterprises to migrate to NFS Version 4, as outlined in the "IBM NFS/DFS Authentication Gateway: A migration bridge to NFS Version 4" companion article.
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Articles |
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28 Feb 2006 |
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nmon performance: A free tool to analyze AIX and Linux performance
This free tool gives you a huge amount of information all on one screen. Even though IBM doesn't officially support the tool and you must use it at your own risk, you can get a wealth of performance statistics. Why use five or six tools when one free tool can give you everything you need?
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Articles |
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27 Feb 2006 |
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System Administration Toolkit: Process administration tricks
Discover how to get the information you want on UNIX(R) processes. Knowing what is running on your UNIX system is one of the most basic requirements of any system administrator. The standard process list is useful, but often the information that it provides is not in the right format or doesn't contain exactly the processes or information you need. In this article, you'll examine how to extend that process further to improve the readability of the information, or provide summaries and information that are not easily obtainable elsewhere. You'll also look at methods for standardizing how to obtain process information across different UNIX platforms.
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Articles |
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21 Feb 2006 |
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Write software for multiple UNIX platforms
If you write software for more than one UNIX(R) platform, you are aware of the difficulty of getting your software to compile on two platforms. This tutorial covers tools and tricks that can make the process of supporting different UNIX platforms significantly easier at the code level. The reason is not the lack of tools or a binary compatibility issue, but rather the problems with the header files and functions that set up a standard UNIX environment.
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Tutorials |
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21 Feb 2006 |
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Network services: Legacy design versus threaded design
So, you've got a great idea for a new network service that'll change the world, and you've just finished your first set of socket programming tutorials. Now you've just got to design the thing and finish off a test implementation, right? Traditionally, programs like this use the venerable UNIX(R) fork() system call to handle connections in a child process, but this is slow and inefficient, even on modern UNIXes. In this article, you'll get a look at using POSIX threads instead of child processes, and you'll also get an introduction to threaded programming -- a topic many UNIX programmers haven't encountered before.
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Articles |
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14 Feb 2006 |
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Get the latest version of OpenSSH for AIX
OpenSSH is a free software tool that supports SSH1 and SSH2 protocols. It's reliable and secure and is widely accepted in the IT industry to replace the r-commands, telnet, and ftp services, providing secure encrypted sessions between two hosts over the network. Get information in this article about OpenSSH version 3.4p1.
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Articles |
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10 Feb 2006 |
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Use free software within commercial UNIX
Increase your productivity and take advantage of the free software that is currently available for the UNIX(R) platform. Tools like GCC (GNU gcc and gcc-c++ compilers), Emacs, and even core utilities like BASH and file utilities (ls, find, and so forth) started their life as free software alternatives under UNIX. In this article, you'll look at the development of some of these tools, as well as licensing, usability issues, and how best to install and integrate this free software into your commercial UNIX operating system.
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Articles |
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09 Feb 2006 |
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IBM NFS/DFS Authentication Gateway
Take advantage of the new features Network File System Version 4 (NFS Version 4) now has to offer. With the ever-growing storage needs in large enterprises and NFS implementations offering more and more features, it makes business sense for enterprises to migrate to NFS Version 4. In this article, we discuss the need and various strategies for migrating from the IBM Distributed Computing Environment (DCE)/Distributed File System(TM) (DFS(TM)) infrastructure to NFS Version 4 on AIX(R) and Linux(R).
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Articles |
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26 Jan 2006 |
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PowerPC storage model and AIX programming
Are you an AIX programmer writing device drivers or using shared storage with multithreaded applications for POWER4 systems like the p690? It's essential that you know and follow the architectural rules so that your programs produce expected results when acccessing shared storage. The authors spell it out for you.
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16 Nov 2005 |
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Secure applications with AIX 5L Version 5.2 and 5.3 using cryptographic APIs
Do you want your applications to have authenticity, integrity, and privacy services? The IBM AIX 5L(TM) Version 5.2 and Version 5.3 (AIX 5L) operating system now offers powerful cryptographic application programming interfaces (APIs) for developing a secure application. AIX 5L exports a set of powerful cryptographic APIs that address both symmetric as well as asymmetric key algorithms. These interfaces provide block and stream cipher algorithms and two crypto-secure hash algorithms: sign and / or verify and Diffie-Hellman key-exchange algorithms.
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27 Oct 2005 |
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AIX system identification
The generation of unique system identifiers (IDs) is important to customers, original equipment manufacturers (OEMs), and independent software vendors (ISVs). A license key manager is just one example in which a unique system ID is used to calculate a license key. With the introduction of POWER5 processor-based systems, the high number of dedicated and shared partitions is a welcomed feature for customers.
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Articles |
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13 Oct 2005 |
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A comparison of security subsystems on AIX, Linux, and Solaris
Learn how to apply a strategy for implementing a single identification and authentication (I and A) framework across a heterogeneous, multi-platform environment. An I and A system provides a layer of abstraction between a user application and the implementation of any authentication or identification functions it needs to perform.
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13 Oct 2005 |
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How to install AIX 5L
Get step-by-step instructions for a number of generic AIX(R) system setup procedures. These instructions should work for any of the AIX(TM) 5L releases. Variations, if any, should be minor.
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31 Aug 2005 |
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Enhancements in AIX 5L Version 5.3 for application development
Examine several enhancements in AIX 5L(TM) Version 5.3 that can assist you in developing your own software. Among the enhancements described in this article are: POSIX (Portable Operating System Interface) Realtime compliant functions, increased Inter-Process Communication (IPC) limits, thread support in gmon.out and gprof, enhancements to malloc and dbx, marking of an executable's read and write sections, and scalability enhancements.
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Articles |
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04 Aug 2005 |
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CPU monitoring and tuning
Learn how standard AIX(R) tools can help you determine CPU bottlenecks. IBM performance experts show you how to interpret the reports generated by these tools for CPU utilization, thread priority, and scheduling to improve performance. They also provide two case studies to give you real-world examples.
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Articles |
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28 Jul 2005 |
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POWER5 virtualization: How to set up the IBM Virtual I/O Server
Get more information on the virtualization capabilities of IBM(R) POWER5(TM) servers. Follow along as Nigel Griffiths illustrates how to set up and use the IBM Virtual I/O Server (VIO Server).
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Articles |
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29 Jun 2005 |
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Implementing and troubleshooting Java on AIX: Quick reference
Get a complete set of instructions for downloading, installing, configuring, and troubleshooting Java(TM) for the IBM AIX(R) operating system.
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26 May 2005 |
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Guide to porting from Solaris to Linux on x86
Solaris is considered one of the closest flavors of UNIX to Linux, but for migration purposes, there can be differences between the two in the areas of memory mapping, threading, or natural language support (to name just a few). This porting guide gives you advice on planning for the port to Linux/x86, and helps you understand the differences in the development environment and architecture.
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29 Apr 2005 |
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Dual boot Linux and AIX
There may be times when you find it necessary to develop in both the Linux and AIX operating environments. This article describes dual booting Linux and AIX on the same IBM eServer pSeries (including eServer p5), eServer i5, or eServer OpenPower server.
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25 Apr 2005 |
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Migrating Solaris Applications to AIX
Need to migrate applications from the SUN Solaris platform to the IBM AIX(R) platform? This document makes it easy.
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24 Mar 2005 |
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Frequently asked questions for developers about AIX 5L 5.2
Get answers to your questions about the development environment and related technologies.
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24 Mar 2005 |
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How to integrate Python 2.3 with the Java Native Interface on AIX 5L
Do you need to resolve the Python 2.3 runtime problem with the Java(TM) Native Interface (JNI) on AIX 5L(TM)? Nam Keung and Roger Leuckie show you how to resolve Python 2.3 program error linking with the JNI program by using a list of sample code to integrate Python 2.3 with JNI call.
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10 Mar 2005 |
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What has AIX 5L Version 5.3 done to strengthen RAS?
Learn about some of the AIX 5L(TM) Version 5.3 features that improve system resilience through data capture, analysis, and automated recovery. Follow along as Shiv Dutta deals with the set of features commonly grouped as RAS (Reliability, Availability and Serviceability).
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24 Feb 2005 |
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Advanced Accounting Utilities for AIX, Part 1: Process accounting and LPAR accounting
Examine how the AIX Advanced Accounting facility in IBM eServer pSeries supports process accounting, logical partition (LPAR) accounting, and transaction accounting. IBM researcher Eric Wu describes the Advanced Accounting Utilities for AIX, which is available for download from IBM AlphaWorks. The Advanced Accounting Utilities for AIX includes two Web services and a Web application. One Web service is responsible for report generation and the other for facility management. The Web application acts as the client of the Web services and includes a Java servlet that handles Web requests. The Web application also includes JSP pages for presentation and human interaction.
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10 Feb 2005 |
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Advanced Accounting Utilities for AIX, Part 2: Application instrumentation and transaction accounting
In this second installment in a series, IBM researcher Eric Wu discusses application instrumentation and transaction accounting using Advanced Accounting Utilities for AIX, which is available for download from IBM alphaWorks. He also focuses on Application Response Measurement (ARM) and illustrates ARM-based transaction accounting. Part 1 covered three different accounting categories and examined process and LPAR accounting.
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10 Feb 2005 |
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Dynamic LPAR tips and checklists for RMC authentication and authorization
This article provides dynamic LPAR tips for Resource Monitoring and Control (RMC) authentication and authorization. The author includes a checklist for DLPAR setup, and information about setting up the HMC/partitions hostname and network. The appendixes provide information gathered from the field about RMC/DLPAR.
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10 Feb 2005 |
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AIX RADIUS Server, Part 2: Installation and configuration
This is the second of a two-part series on the AIX Remote Authentication Dial-In-Service (RADIUS) server. In Part 1, Denise Genty discussed the authentication and accounting protocols. Follow along with her now as she focuses on the installation, configuration, user authorization, debugging of the RADIUS server.
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27 Jan 2005 |
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AIX RADIUS server, Part 1: Authentication and accounting protocols
This is the first of a two-part series on the AIX Remote Authentication Dial-In User Service (RADIUS) server. Follow along with Denise Genty as she discusses the authentication and accounting protocols and explains the basic RADIUS packet flow using a modem example. Part 2 of this series focuses on installation, configuration, user authorization, and the debug output of the RADIUS server.
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13 Jan 2005 |
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IBM embraces open source: MySQL setup on AIX 5L
This series of articles highlights the operability of open source software on IBM platforms. The author introduces MySQL on AIX 5L and covers the proper procedures and parameters that must be set to build the popular MySQL database on AIX 5L with VisualAge C++.
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02 Nov 2004 |
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When segments collide
While sizing the heap for 32-bit Java applications on AIX, you can sometimes run into situations where a segment is claimed by two or more parts of the process simultaneously. In this article, we show how to detect this situation by using a well-established set of applications as examples, and we also show the reasoning behind the configuration changes suggested to avoid this situation.
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28 Jul 2004 |
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Deploying IBM DB2 Content Manager OnDemand in a HACMP environment
This article describes the steps needed to configure OnDemand in a two-node HACMP environment.
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15 Jul 2004 |
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Serving X from a Windows laptop
This article is an update to a previous article about working on UNIX(R) through your laptop. The author describes how to run the same environment from your laptop as you do when directly connected to a UNIX server's console terminal. The article discusses how to use X clients, installing uwin, and running X clients through a VPN.
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27 May 2004 |
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Maximizing Java Performance on AIX: Part 5: References and Conclusion
This is the conclusion of the 5-part series providing tips and techniques that are commonly used for tuning Java(TM) applications for optimum performance on AIX(R). We touch upon other interesting areas of Java performance tuning for AIX, look at a few case studies, and then end the series with a list of useful references.
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17 May 2004 |
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ncp and nweb -- free tools to collect and display for your pSeries capacity planning data
These free tools collect and display a huge amount of information about the workloads on your pSeries servers. Even though IBM doesn't officially support the tools and you must use them at your own risk, you can get vital information about which servers are over-utilised and which are under-utilised.
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10 May 2004 |
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Maximizing Java Performance on AIX: Part 4: What goes in
This 5-part series provides several tips and techniques that are commonly used for tuning Java(TM) applications for optimum performance on AIX(R). This article deals with situations where I/O or networks may become bottlenecks.
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03 May 2004 |
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Troubleshooting Java on AIX: Data collection for debugging hangs, high CPU, and performance issues
This article gives instructions for troubleshooting Java(TM) for the IBM(R) AIX(R) operating system. It provides short, simple, and complete instructions for collecting data for debugging hangs, slow responsiveness, or looping situations with Java applications running on AIX. By following the instructions in the article, you'll be able to collect the right data and complete the required steps before contacing IBM Support, thereby expediting your call. This article does not provide information for the analysis of any of the data collected, nor does it provide operating system or application recommendations for resolving issues. This article is provided by the IBM eServer(TM) UNIX and ISV Technical Support Team for AIX and Java in Austin, Texas.
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29 Apr 2004 |
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Troubleshooting Java on AIX: Collecting data for memory issues
This article gives instructions for troubleshooting Java(TM) for AIX(R). It provides short, simple, and complete instructions for collecting information for analyzing memory-related issues associated with Java applications running on AIX. By following the instructions in this article, you'll be able to complete the required steps before contacting IBM(R) Support for help, thereby expediting your call. The article does not give information about the analysis of any of the data collected, nor does it provide operating system or application recommendations for resolving issues. This article is provided by the IBM eServer(TM) UNIX and ISV Technical Support Team for AIX and Java in Austin, Texas.
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28 Apr 2004 |
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Maximizing Java performance on AIX: Part 3: More is better
This 5-part series provides several tips and techniques that are commonly used for tuning Java(TM) applications for optimum performance on AIX(R). A discussion of the applicability of each tip is also provided. Using these tips, you should be able to quickly optimize the Java environment to suit your application's needs.
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10 Apr 2004 |
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A sample Enterprise Storage System (ESS2105-800) implementation with AIX 5.1-03
This article is based on notes and journals from a benchmark engagement at SPC, Waltham. It describes the storage architecture, design, and implementation of an IBM Enterprise Storage System (ESS) supporting a large Oracle database. It focuses on system configurations and runtime performance monitoring from an AIX host perspective. This article is intended to serve as a sample reference platform for future storage proven projects using IBM Storage Systems.
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30 Mar 2004 |
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Maximizing Java performance on AIX: Part 1: The basics
This 5-part series provides several tips and techniques that are commonly used for tuning Java(TM) applications for optimum performance on AIX(R). A discussion of the applicability of each tip is also provided. Using these tips, you should be able to quickly optimize the Java environment to suit your application's needs.
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29 Mar 2004 |
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Solving the atexit problem on AIX 5.2
Do you need to resolve the segmentation fault while using the atexit handler function on AIX(R) 5.2? This article explores techniques that can be used to resolve program crashes resulting from missing atexit handlers.
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15 Mar 2004 |
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JNI Programming on AIX
This article provides general guidance for developing Java Native Interface (JNI) applications using IBM JDK for AIX, specifically targeting IBM JDK 1.4.1 for AIX. Specifics of both 32-bit and 64-bit flavors of JDK 1.4.1 are discussed where appropriate. Some generic discussion applies to JNI programming on Java II Platform JDKs from IBM in general. This article is not intended as a JNI API tutorial, but is a brief discussion of the most important specifics of JNI programming on AIX. Knowledge of the JNI specification and full command of the JNI is assumed.
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15 Mar 2004 |
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IBM embraces open source: Building Libodbc++ on AIX5L
This paper introduces libodbc++ with DB2 UDB 8.1 on AIX5L. It covers the proper procedure and parameters that must be set to build libodbc++ 0.2.2 on AIX5L with VisualAge C++ ( VACPP). It even provides an installation script that can be used to build libodbc++ 0.2.2 which contains all the changes needed to build the libodbc++ library for you. This is the second in a series of articles that highlights the operability of open source software on IBM platform.
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04 Mar 2004 |
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Setting up AIX Workload Manager in 30 minutes
This article explains Workload Manager (WLM) and shows how simple it is to set up and use. In a step-by-step process, the author shows you how to use WLM in passive mode, and explains your applications' use of CPU, memory, and disk I/O. He also discusses using WLM in active mode to optimize application performance.
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01 Mar 2004 |
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IBM Embraces Open Source: How to Set up unixODBC on DB2 for AIX5L
This series of articles highlights the operability of open source software on the IBM platform. This paper introduces unixODBC with DB2 UDB 8.1 on AIX5L. It provides step-by-step instructions on how to set up a unixODBC Driver Manager that connects to a DB2 UDB 8.1 data source on an AIX5L system; further extending the capability of open source.
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05 Feb 2004 |
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AIX 5.2 performance tools update, Part 3
This is the third in our series on AIX 5.2 performance tools updates. This article discusses the new AIX 5.2 tprof command and the Cpu Utilization Reporting Tool (CURT). tprof samples CPU utilization and accounts for time in threads and program modules using the system clock interrupts, which occur at every 100th of a second. CURT reads an AIX trace sequentially and processs the trace hooks, doing bookkeeping along the way to produce a CPU utilization report.
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20 Jan 2004 |
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Lotus Domino and AIX DLPAR
The IBM eServer pSeries Dynamic Logical Partitioning (DLPAR) feature in AIX 5.2 provides the flexibility to dynamically assign pSeries hardware resources without stopping the system. This article discusses how to use DLPAR in a Lotus Domino environment that's running an industry standard iNotes mail workload. The authors show how DLPAR worked extremely well. They also describe how to easily modify the system to respond to increases and decreases in system resources while maintaining a continuously running workload.
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18 Dec 2003 |
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DB2 and AIX tuning essentials for DB2 performance
Are you running DB2 on AIX? Ever wondered what you can you do within AIX to produce noticeable DB2 performance improvements? This article addresses that question, and also discusses the most important combination of DB2 and AIX tuning parameters for optimum DB2 performance. The author shows you how to implement and design your database with performance in mind, depending on your workload and data requirements. He introduces the best database layout from an operating system perspective, and the best performance settings for both the operating system and the relational database environments.
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18 Dec 2003 |
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AIX 5.2 performance tools update, Part 2
This is the second article in a series about new and enhanced AIX(R) 5.2 performance tools. This article discusses how the tools further empower AIX developers in debugging system and application performance behavior. The vastly improved system tuning utilities in AIX 5.2 help developers and administrators analyze, capture, and identify application and system performance behavior and problems.
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20 Nov 2003 |
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Performance and tuning tips for AIX 5.1-03 (64-bit kernel) on a 16-way p670
This article describes how to analyze and tune AIX system performance. The author uses a benchmark case where I/O was the main focus. The exercise followed the classic AIX performance analysis methodology by eliminating all system bottlenecks, and achieved the goal of saturating a 16-way p670. The results of the exercise improved the application throughput by about 40%.
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20 Nov 2003 |
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Running your Java application on AIX, Part 2: JVM memory models
This is the second in a series of articles to help you get your Java application running quickly and smoothly on the AIX platform. This article discusses the Java process memory model on AIX for both 32-bit and 64-bit versions. The authors discuss AIX 32-bit process address space, how it affects the size of the Java heap you can get for your 32-bit JVM, and how you juggle to get the largest Java heap possible as a 32-bit Java process. They also describe the 64-bit process address space and how it lets you have an amazingly big Java heap.
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22 Oct 2003 |
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Running your Java application on AIX, Part 1: Getting started
IBM Developer Kits for AIX, Java Technology Edition (SDK, JDK) provide the performance, scalability, and stability you need for deploying enterprise e-business Java solutions. This series of articles will help you quickly start running your Java applications, including getting the toolkit, understanding the AIX implementation of JVM, and common porting issues.
This article explains how to get started, how our just-in-time (JIT) compiler works, and the implications of using Java native interface (JNI) on AIX. The second article will discuss the complicated Java process memory model on AIX. The third article will be all about garbage collection, Java thread, its connection with POSIX thread and AIX Kernel thread, stack size issues, and more. The last article will discuss common problems people run into when porting their Java applications to AIX.
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01 Oct 2003 |
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AIX 5L improvements in volume management performance
AIX's volume management has evolved dramatically with AIX 5L. Many common operations have been optimized, resulting in significant performance improvements. While volume management is not often considered a performance critical task, configuration of large servers will be more efficient because of ongoing optimizations in AIX 5L. This article describes the performance improvements in volume management in recent AIX releases.
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25 Sep 2003 |
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Using Network File System in AIX -- a primer
In this article we discuss Network File System (NFS), a popular system used by system administrators to distribute filesystems over different nodes in a network environment. NFS is available in all Unix implementations including all releases of AIX. We discuss the components that make up NFS and show how it is generally implemented, with special emphasis on AIX. This article will be of interest to AIX system administrators as well as AIX programmers who work with more than one system in a networked environment.
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17 Sep 2003 |
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AIX 5.2 performance tools update, part 1
With the release AIX 5L Version 5.2, there was a major revamp of the performance tools. Some of the performance tuning commands were replaced, there were new commands added and all of the tuning commands how use the same command syntax and provide consistent behavior.
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17 Sep 2003 |
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How to energize your scripts with the new KornShell
AIX 5L includes ksh93, the latest major revision of the KornShell language, which has a number of significant enhancements over its previous major release, the 1988 version. The new version provides an alternative to Tcl and Perl and compares favorably in speed and functionality. Find out how you can take advantage of ksh93.
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17 Sep 2003 |
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Getting more memory in AIX for your Java applications
Does your Java(TM) application need more memory than you get from a plain vanilla Java installation? Do you want to talk in gigabytes, not in kilobytes? This article is your key to unleashing the full power of Java on AIX(R).
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01 Sep 2003 |
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Upgrading to VisualAge C++ for AIX, Version 6.0
C++ for AIX(R) Version 6.0 offers several enhancements over Version 5.0, especially in template handling and OpenMP industry standard support. This article gives an overview of changes and enhancements in VisualAge C++ for AIX V6.0, useful information about upgrade planning, and the process to upgrade to V6.0.
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20 Aug 2003 |
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Best practices for programming in C
Although the C language has been around for close to 30 years, its appeal has not yet worn off. It continues to attract a large number of people who must develop new skills for writing new applications, or for porting or maintaining existing applications.
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26 Jun 2003 |
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Working on UNIX through your laptop
I use cygwin to open up terminals from my Windows laptop to my IBM p270 workstation (running AIX 5.1 ML3) when I want to stay in the same windowing environment for both. The following procedure will work on any flavor of Unix that uses terminfo terminal descriptions.
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26 Jun 2003 |
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AIX 5L Version 5.2: What's in it for You?
With the release of AIX 5L Version 5.2 (hereafter referred to as Version 5.2) IBM continues the tradition of excellence. This release includes another batch of enhancements to further empower the developers. This article will deal with a subset of those enhancements with the hope that the readers would see enough benefit in them to justify a migration.
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05 Jun 2003 |
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Sharing system files in AIX -- a primer
Learn two ways to update and manage system administration files in an AIX network: using distribution by file copying, and using Network Information Service (NIS). Find out how to choose between the two methods and get expert information on how to use both.
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13 Mar 2003 |
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Is your AIX environment secure?
Are you concerned about protecting your AIX system from intruders? The author tells ways to maintain system integrity and highlights security tools you can use to diagnose an AIX system and identify potential security lapses.
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20 Dec 2002 |
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Use Direct I/O to improve performance of your AIX applications
An alternative I/O technique called Direct I/O can give your AIX applications improved performance. This article discusses the benefits of Direct I/O and tells how to implement it.
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07 Nov 2002 |
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AIX linking 101
Are you writing or porting applications to AIX(R)? Get a quick introduction to the most commonly used features of the linker and loader, plus practical tips and techniques. This short tutorial from AIX expert Gary Hook focuses primarily on the library search path.
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Tutorials |
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12 Sep 2002 |
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Deploying OpenSSH on AIX
Learn how to improve the security and integrity of your AIX(R) servers using network services provided by the OpenSSH implementation of the Secure Shell protocol.
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Tutorials |
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12 Sep 2002 |
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Securing AIX Network Services
In this online course, you'll gain a better understanding of the network services in AIX(R) and the impact each one has on system security. Use the information in this tutorial to achieve the right balance between functionality and security.
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Tutorials |
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12 Sep 2002 |
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AIX linking 102
Are you writing or porting applications to AIX(R)? Get a quick introduction to the most commonly used features of the linker and loader, plus practical tips and techniques. This short tutorial from AIX expert Gary Hook focuses primarily on the library search path.
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Tutorials |
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12 Sep 2002 |
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Solving coding problems with temporary variables when porting applications from Solaris to AIX
Need to port Solaris applications to AIX? This article focuses on the differences between AIX and Solaris when using temporary variables.
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01 Jul 2002 |
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Migrating Tru64 Applications to AIX
This article focuses on migration of Tru64 applications to AIX on the PowerPC architecture.
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20 May 2002 |
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Porting Java applications to AIX
Have you ever thought about why Java applications must be ported to other operating systems? This paper will answer why Java applications need to be ported. It's based upon real cases that I've helped resolve with some of our key independent software vendors. My hope is that after reading this paper, you will have a better understanding of issues that might crop up while porting your Java-based application to AIX.
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01 May 2002 |
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New updates: Clustering -- a basic 101 tutorial
Confused by clusters? We're not talking grapes. Here's a sweet tutorial -- now updated -- on clustering, high availability, redundancy, and replication. Not to mention failover, load balancing, CSM, and resource sharing. We've included information on the latest clustering solutions from IBM. Enjoy!
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03 Apr 2002 |
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Using Samba as a primary domain controller
Open source Samba turns a UNIX(R) or Linux(R) system into a file and print server for Microsoft(R) Windows(R) network clients. Tom Syroid dishes up a juicy tutorial that shows you how to configure Samba as the primary domain controller on an xSeries(R) server.
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03 Apr 2002 |
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