I'm a bit confused about how exactly to add stuff with NRPE to monitor local services on my remote hosts. I got the basics out of the way and I can already monitor the easy stuff like users, procs, swap etc. More ambitiously, I wanted to monitor the status of my "pbs_mom" (Torque Scheduler daemon) on each node in my cluster. I found the script check_pbsmom.sh on the NagiosExchange (snippet below) and copied it to my /usr/local/nagios/libexec. Then I added this line to my nrpe.cfg command[check_pbsmom]=/usr/local/nagios/libexec/check_pbsmom But then I don't seem to have much success. remotehost>/usr/local/nagios/libexec/check_nrpe -H localhost -c check_pbsmom NRPE: Unable to read output If I just run the shell script though it seems to be working /usr/local/nagios/libexec/check_pbsmom.sh PBS_MOM OK: Daemon is running. Host is listening. What am I doing wrong here! I'm still a bit confused about the interaction between command.cfg on the monitoring machine and the nrpe.cfg on the remote host. Any advice? -- Rahul #!/bin/bash # SYNOPSIS # check_pbsmom [<TCP port>] [<TCP port>] ... # # DESCRIPTION # This NAGIOS plugin checks whether: 1) pbs_mom is running and # 2) the host is listening on the given port(s). If no port # number is specified TCP ports 15002 and 15003 are checked. # # AUTHOR # <a href="mailto:Wayne.Mallett@jcu.edu.au">Wayne.Mallett@jcu.edu.au</a> OK=0 WARN=1 CRITICAL=2 PATH="/bin:/sbin:/usr/bin:/usr/sbin" # Default listening ports are TCP 15004 and 42559. if [ $# -lt 1 ] ; then list="15002 15003" else list="$*" fi if [ `ps -C pbs_mom | wc -l` -lt 2 ]; then echo "PBS_MOM CRITICAL: Daemon is NOT running!" exit $CRITICAL else for port in $list ; do if [ `netstat -ln | grep -E "tcp.*:$port" | wc -l` -lt 1 ]; then echo "PBS_MOM CRITICAL: Host is NOT listening on TCP port $port!" exit $CRITICAL fi done echo "PBS_MOM OK: Daemon is running. Host is listening." exit $OK fi