[CentOS] Getting the return value of the last command run

Christopher J. Buckley chris at cjbuckley.net
Mon May 30 14:59:14 UTC 2011

Have a read up on using return codes in Bash.


<http://tldp.org/LDP/abs/html/exit-status.html>Quick example:


ls foobar

   if [ $? -eq 0 ] ; then
      echo "successful"
      echo "not successful"

You get the idea..


On 30 May 2011 15:38, Dotan Cohen <dotancohen at gmail.com> wrote:

> All commands return a value, usually 0 if run properly. For instance, try:
> $ ls && echo "done"
> $ lsd && echo "done"
> The echo command is only executed if the ls command exited
> successfully. If one did not add the echo command with the && after a
> command, how can he determine if the command exited successfully? I
> have a particularly troubling script that gives does not mention if it
> exits successfully or not. I could modify it (and probably will some
> day) but in general I'd like to know the answer to this question as a
> learning experience.
> Thanks.
> --
> Dotan Cohen
> http://gibberish.co.il
> http://what-is-what.com
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos

Kind Regards,
Christopher J. Buckley
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