Shell Scripting

Shell scripts for all types of task automation.

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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Apple

Automount AFP shares in OSX

0
1 year ago
by Kristijan in

So I’ve finally got around to building my NAS. It’s a pretty 12TB FreeNAS using RAIDZ…she runs very nicely :) At first, I was using SMB, but found the performance from AFP better, that’s for another post though. For the life of me, I couldn’t find the “Mac” way of auto mounting an AFP share. So being the sysadmin ninja that I am, I just went along and did it my own way.

Luckily for us, the pretty OSX frontend sits on top of a UNIX backend. In short, I ended up using autofs, and it works rather well. Below is how to get it working.
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Tivoli

Keeping an eye on TSM volumes

1
1 year ago
by Kristijan in

I wrote a quick script which tells me when volumes in TSM (Tivoli Storage Manager) have access and/or media issues and shoots me off an email. The script does two things:

1) Checks for volumes which are NOT in the states READWRITE or OFFSITE.
2) Checks for volumes which have a read/write error count >0.

I’m sure that most people running TSM in their environment have some sort of daily reporting that gets sent out. If that’s the case, you can simply extract the SQL from the script and use it in your own reporting tools.
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AIX

Calculate total usage in AIX volume group

2
1 year 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
1 year 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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