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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.
Also available in: Russian  
Articles 21 Feb 2006
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.
Also available in: Chinese   Russian  
Articles 12 Dec 2006
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.
Also available in: Russian  
Articles 07 Jun 2006
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.
Also available in: Chinese   Russian  
Articles 25 Jul 2006
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.
Also available in: Chinese   Russian  
Articles 03 Jul 2006
System 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.
Also available in: Chinese  
Articles 15 Apr 2008
System 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.
Also available in: Chinese   Japanese  
Articles 26 Feb 2008
System 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.
Also available in: Chinese  
Articles 04 Mar 2008
System 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.
Also available in: Chinese   Russian  
Articles 04 Dec 2007
System 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.
Also available in: Chinese   Russian  
Articles 23 Oct 2007
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.
Also available in: Chinese   Russian  
Articles 14 Aug 2007
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.
Also available in: Chinese  
Articles 03 Jul 2007
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.
Also available in: Chinese   Russian  
Articles 13 Feb 2007
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.
Also available in: Chinese   Russian  
Articles 19 Dec 2006
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.
Also available in: Russian  
Articles 01 Aug 2006
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.
Also available in: Russian  
Articles 13 Jun 2006
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.
Also available in: Chinese  
Articles 10 Mar 2009
Developing custom plug-ins for the Vim editor
Learn how to extend the popular and versatile Vim editor to suit your systems administration needs using Vim's custom scripting language and options such as Perl and Python.
Also available in: Chinese  
Articles 09 Nov 2010
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.
Also available in: Chinese  
Articles 26 Sep 2006
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.
Also available in: Chinese  
Articles 27 Oct 2009
AIX security commands, Part 2: Advanced AIX security commands
Management of system administration is always a tedious task. Various tools and methods are available to handle administrative activities on a system. AIX 6.1 provides different security features that help to manage user and group administration and maintain integrity on a system. This articles provides a list commands which are enabled using these features.
Also available in: Chinese  
Articles 25 Oct 2011
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+.
Also available in: Chinese   Russian  
Articles 28 Aug 2007
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.
Also available in: Chinese   Russian  
Articles 06 Mar 2007
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.
Also available in: Russian  
Articles 10 Apr 2007
The NIM cheat sheet
Have you ever had to install a large number of IBM AIX servers from scratch? Do you need a quick and easy way to create and store operating system backups? Would you like to know how to perform AIX operating system migrations on live servers quickly? Well, here is your complete cheat sheet for setting up and using the Network Installation Manager (NIM) tool in AIX. Learn how to set up the server and client components, perform a basic installation, use NIM to create mksysb backups, and perform alt_disk migrations over the network.
Also available in: Chinese  
Articles 07 Jan 2013
Controlling symbol visibility for shared libraries: Part 1 - Introduction to symbol visibility
This is the first one of our two-part series about symbol visibility. In this part, you may get to know the fundamental concept about symbol and symbol visibility, and ways for a programmer to make symbol visibility under control on IBM® AIX® that runs on the IBM POWER® platform. Further, this article details about symbol preemption to show the subtle difference between exported symbol and symbol that is exported but also protected.
Also available in: Chinese   Russian  
Articles 12 Jun 2013
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.
Also available in: Chinese   Russian   Japanese  
Articles 07 Sep 2007
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.
Also available in: Chinese   Russian  
Articles 20 Mar 2007
Differentiating UNIX and Linux
Investigate the areas where UNIX and Linux 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, 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.
Also available in: Russian  
Articles 14 Mar 2006
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.
Also available in: Russian   Japanese  
Articles 11 Feb 2009
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.
Also available in: Chinese  
Articles 25 Aug 2009
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.
Also available in: Chinese   Russian  
Articles 24 Apr 2007
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!
Also available in: Chinese   Russian  
Articles 09 Dec 2008
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).
Also available in: Chinese   Russian  
Articles 18 Dec 2007
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.
Also available in: Chinese   Russian  
Articles 20 Nov 2007
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.
Also available in: Chinese   Russian  
Articles 17 Nov 2009
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.
Also available in: Chinese   Russian  
Articles 15 May 2007
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