Mounting NSS Pools/Volumes via BASH scripts in OES Linux

  • 7011931
  • 13-Mar-2013
  • 20-Mar-2013

Environment

Novell Open Enterprise Server 2 (OES 2)
Novell Open Enterprise Server 11 (OES 11) Linux


Situation

When trying to mount NSS Pools/Volumes from the terminal command line via a script or from a cron job calling a script, the script will run, no error messages will be produced, and the NSS Pools/Volumes will not be mounted.

Resolution

Generally when mounting directly from the terminal the command to mount NSS devices will look like:
nss /poolactivate=<POOL_NAME>
nss /volumeactivate=<VOLUME_NAME>

The issue arises since the NSS command is symlinked to a perl script (nss.pl) which is located in '/opt/novell/nss/sbin/'

When using a bash script/cron job to mount and/or unmount NSS Pools/Volumes, it is therefor necessary to call the absolute path to the executable. 

So, in this case this would look as:

/opt/novell/nss/sbin/nss.pl /poolactivate=<POOL_NAME>
/opt/novell/nss/sbin/nss.pl /volumeactivate=<VOLUME_NAME>

Cause

This is caused by the difference of running a command in a shell, and invoking a script.  When running a command natively in a shell, it knows all of the path variables.  When executing the same command via a script, the path variables are not always passed on, and therefore the script fails.

When running a command via a script, it is best practice to declare the absolute path to the executable, and is advisable to declare that actual executable in the script, and not a symlinked executable.
 

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