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I am installing nagios3 on centos.

After stopping the nagios server and then restarting I get the message

Starting nagios runuser: cannot set groups:Operation not permitted.

what does this mean

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run it as root and you should be all set. – user268202 Feb 2 '15 at 6:06
up vote 2 down vote accepted

A few things off the top of my head. Does the group that belongs to the user your switching to exist? Does the runuser command have the setguid sticky bit set? Check the output of ls -l $(which runuser). Alternately, it's possible you might have a partition mounted with the nosuid flag. Check the output of mount for that.

--Christopher Karel

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I didn't get it. I don't have the sticky bit. and i dont see a nosuid flag in the output of mount too. – kapitanluffy May 31 '13 at 23:05

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