Seth, I am running simply yum check-update, but nothing is returned to Nagios at all. Nagios simply reports 'No output!'. >From running the command at the command line, should I expect to see a 0 returned ? Thanks - great program ! Matthew -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.dulug.duke.edu/pipermail/yum/attachments/20030924/93bb74e5/attachment.htm