~#grep USER1 /etc/nagios/resource.cfg $USER1$=/usr/lib/ So, nagios can't find it's own plugins after start.
~# grep USER1 /etc/nagios/resource.cfg # Nagios supports up to 32 $USERx$ macros ($USER1$ through $USER32$) # Sets $USER1$ to be the path to the plugins $USER1$=/usr/lib/nagios/plugins ~# rpm -qf /etc/nagios/resource.cfg nagios-common-2.6-alt1