File is Locked

I am new to Linux - so I have a question.  I updated my aliases file and wanted to re-initialize it but I am getting this message.  Any way to check to see what is wrong?

Alias file /etc/aliases is locked (maybe being rebuilt)

Is someone else in it?  How do I check that?

Thanks for your help
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suzbaraAsked:
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paullamhkgCommented:
try ps -aux to see any other process using the file /etc/aliases, or any dead process, if find, kill -9 PID to kill the process and try again.

eg.
USER       PID %CPU %MEM   VSZ   RSS TTY      STAT START   TIME COMMAND
root     19866  0.0     0.5       2640  696  pts/0       R    15:28       0:00 ps -aux

so the PID of the ps -aux is 19866, and if I want to delete these process just 'kill -9 19866' the process of ps -aux will kill and close.

remember you must be the root to do the kill process

so if you kill the process which holding your /etc/aliases, you should able to use it again. remembr to make a backup copy of your /etc/aliases before you kill any process related to /etc/aliases.

Hope this can help

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Mihai BarbosTrying to tame bits. They're nasty.Commented:
You might try using lsof (lsof /etc/aliases would be the command) to find out who is locking the file. And than kill the offender as paullamhkg said.
Try first just a kill, kill -9 might be a bit too drastical to start with.

suzbaraAuthor Commented:
Thanks guys.  The file was actually released after a bit... but I will keep this for next time!!!

:)  S
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