PowerVC compatible "ready to deploy" images for AIX 7.1 TL 5 and AIX 7.2 TL 2   “In addition to installation images for AIX, "cloud" image formats are also made available that can be readily deployed with PowerVC. These images contain a default AIX base media install configuration that includes Cloud Init and its dependencies. The images can be obtained from the IBM Entitled System Support website or IBM Passport Advantage. For AIX 7.1 TL 5 SP0 and AIX 7.2 TL 2 SP0, the image files have the following names”.... [More]

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Starting with AIX Version 7.2, the AIX operating system provides the Live Update function which eliminates downtime required when patching the AIX operating system kernel. Your application workloads are not stopped, yet they can take advantage of the new fixes immediately after the Live Update operation, without a reboot. Administrators can use the Live Update feature to install AIX interim fixes, service packs and technology levels.   In a nutshell, Live Update allows AIX administrators to install AIX updates in-place, but instead of... [More]

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OpenSSH 7.0 & greater disable ssh-dss by default. http://bit.ly/2vZBMyH If you upgrade OpenSSH, to 7.1.102.1100 on AIX for example, you may notice that you're unable to login afterwards, with ssh-dss keys. In syslog you'll see messages similar to this:   Syslog: Sep 11 15:40:34 cgaix auth|security:info sshd[9961802]: userauth_pubkey: key type ssh-dss not in PubkeyAcceptedKeyTypes [preauth]   # lslpp -l openssh\*   Fileset                      Level  State... [More]

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Before I describe the sudo problem I hit, I will tell you that the root cause of the problem is evident in the following output:   # mount   node       mounted        mounted over    vfs       date        options -------- ---------------  ---------------  ------ ------------ ---------------         ... [More]

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Using PowerSC RTC to monitor for the deletion of a specific file.   One of my customers was concerned that someone or something was randomly deleting the /etc/niminfo on several of his AIX hosts. We discussed several ways in which he could track down who or what was removing this file. Obviously, the AIX audit subsystem would be an ideal method of capturing this event. However, PowerSC Real Time Compliance (RTC) can also monitor and capture this type of event.   “The PowerSC™ Real Time Compliance feature continuously... [More]

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The AIX minidump facility was introduced with AIX 5.3 TL3. A mini dump is a small compressed dump that is stored to NVRAM when a system crashes or a dump is initiated, and then written to the AIX error log on reboot. It can be used to see some of the system’s state and do some debugging when a full dump is not available. It can also be used to get a quick snapshot of a crash without having to transfer the entire dump from the crashed system to IBM support.   Please refer to the following, official guide, on " How to examine a... [More]

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The latest release of the VIOS provides a way to automatically backup your virtual device configuration whenever it changes. From the IBM Knowledge Center for POWER8:   https://www.ibm.com/support/knowledgecenter/POWER8/p8hcg/p8hcg_viosbr.htm   "The viosbr command automatically creates a backup, whenever there are any configuration changes. This functionality is known as the autoviosbr backup. It is triggered every hour, and checks if there are any configuration changes, or any other changes. If it detects any changes, a backup... [More]

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On more than one occasion I’ve written articles and blogs on how to migrate AIX systems to a new version of the AIX operating system. You can find a list these articles (and others) here . Each of the NIM articles focuses on migrating AIX systems (which are configured as NIM clients). The approach is always the same; use a NIM master to migrate the NIM clients to the next release of AIX. What they don’t discuss is how to migrate your NIM master to a new version of the OS. This is the very first step you should take before you... [More]

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I LPM'ed an AIX LPAR from Frame A to Frame B. The LPAR id before the LPM was 99 and after the LPM it's still 99. And the system id has changed, as expected. Good.   Before migration.   root@lpar1 / # uname -L 99 lpar1   root@lpar1 / # lsattr -El sys0 -a systemid systemid IBM, 017268B60 Hardware system identifier False   After migration.   root@lpar1 / # uname -L 99 lpar1   root@lpar1 / # lsattr -El sys0 -a systemid systemid IBM, 0157F5B16 Hardware system identifier False   Great, that's exactly... [More]

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