Posts tagged aix

AIX

Upgrading your AIX environment using multibos

4
1 year ago
by Kristijan in

If you haven’t clued on by now, AIX is my operating system of choice. I’m sure there are many arguments for and against, but looking at it from a systems administrator view point, it’s second to none. Anyway, that’s a story for another time. What I’m writing about today is patching your AIX installations using multibos. Now before I get started, I’ll stress two points:

1) Chris Gibson has already written two great (and far more in depth) articles on multibos, which I recommend reading before going any further (Links: here and here).
2) This blog of mine serves two purposes; To share some of the things I come about during my sysadmin activities and secondly also a dumping ground for documents I write for myself. This post is the latter, as multibos isn’t something that I use daily (maybe a few times a year), and really, who’s going to remember all those syntax switches :P

Now, assuming you’ve read both articles, I don’t need to go into the benefits of multibos and I’ll dive straight into the how. I’ll be working on upgrading an AIX instance running 6100-05-01-1016 to the latest ML which at the time of writing is 6100-06-04-1112
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AIX

CSM Commands (dsh, dping, dcp and dshbak) for AIX

4
1 year ago
by Kristijan in

Cluster Systems Management (CSM) software provides a bunch of tools to manage from a single point of control your AIX environment. There are a number of commands available[1] but the main four which I find quite useful are dsh, dping, dcp and dshbak. In this post, I’ll go over each command and some of its uses.
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AIX

Quickly show memory usage under AIX

5
1 year ago
by Kristijan in

Very quick and basic shell script to show total/free/used memory on a host running AIX.

kristijan@AIX > ./meminfo
 
Memory Information
==================
total memory = 1884 MB
free memory  = 94 MB
used memory  = 1790 MB

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AIX

Calculate total usage in AIX volume group

2
2 years ago
by Kristijan in

When looking at the output of the “lsvg” command in AIX, you’ll see a whole bunch of information regarding the volume group. The PP size, how many PPs are in the volume group, stale PVs, quorum, so on and so on. What I’m normally looking for when running the “lsvg” command is:

1. How much storage (PPs) do I have free.
2.How much storage (PPs) is in use.
3.How much storage (PPs) is actually being used.

I can get the first two questions answered looking at the output of “lsvg”, but the last one I cannot.
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AIX

Maintain wtmp on AIX

3
2 years ago
by Kristijan in

/var/adm/wtmp on AIX maintains a list of past user sessions and information about the restart/shutdown of that particular system. While this file is normally very small in terms of file size, on an active box, this can grow if not properly maintained. You can use the “last” command to read wtmp, or export it to a text file for further processing with “fwtmp”. While you can simply redirect nothing into wtmp to empty it out “>/var/adm/wtmp”, it’s always a good idea to keep this file (or at least a backup) for security/auditing reasons.
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