Nagios Support Forum

naveen@cd:~$ systemctl status nagios-nrpe-server.service
● nagios-nrpe-server.service - Nagios Remote Plugin Executor
Loaded: loaded (/lib/systemd/system/nagios-nrpe-server.service; enabled; vend
Active: failed (Result: start-limit-hit) since Wed 2019-05-08 14:15:34 IST; 2
Docs: http://www.nagios.org/documentation
Process: 30252 ExecStopPost=/bin/rm -f /var/run/nagios/nrpe.pid (code=exited,
Process: 30245 ExecStart=/usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -f $NRPE_OPTS
Main PID: 30245 (code=exited, status=0/SUCCESS)

May 08 14:15:34 cd nrpe[30245]: Server listening on :: port 5666.
May 08 14:15:34 cd nrpe[30245]: Listening for connections on port 5666
May 08 14:15:34 cd nrpe[30245]: Allowing connections from: 127.0.0.1, 192.168.1.
May 08 14:15:34 cd systemd[1]: Stopping Nagios Remote Plugin Executor...
May 08 14:15:34 cd nrpe[30245]: Caught SIGTERM - shutting down...
May 08 14:15:34 cd nrpe[30245]: Daemon shutdown
May 08 14:15:34 cd systemd[1]: Stopped Nagios Remote Plugin Executor.
May 08 14:15:34 cd systemd[1]: nagios-nrpe-server.service: Start request repeate
May 08 14:15:34 cd systemd[1]: nagios-nrpe-server.service: Failed with result 's
May 08 14:15:34 cd systemd[1]: Failed to start Nagios Remote Plugin Executor.

What Operating system and release is the NRPE agent running on?
Have you looked at the /var/log/messages log file for any errors after you try to start the agent?

Can you get the following file from that server and post it here? Also, run this as root ant post the output here.

root@onkar-pc:/tmp/nagios-plugins-release-2.2.1# systemctl status nagios-nrpe-server.service
● nagios-nrpe-server.service - Nagios Remote Plugin Executor
Loaded: loaded (/lib/systemd/system/nagios-nrpe-server.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Fri 2019-05-10 12:36:03 IST; 4min 17s ago
Docs: http://www.nagios.org/documentation
Process: 26654 ExecStopPost=/bin/rm -f /var/run/nagios/nrpe.pid (code=exited, status=0/SUCCESS)
Process: 26653 ExecStart=/usr/sbin/nrpe -c /etc/nagios/nrpe.cfg -f $NRPE_OPTS (code=exited, status=203/EXEC)
Main PID: 26653 (code=exited, status=203/EXEC)

May 10 12:36:03 onkar-pc systemd[1]: Started Nagios Remote Plugin Executor.
May 10 12:36:03 onkar-pc systemd[26653]: nagios-nrpe-server.service: Failed to execute command: No such file or directory
May 10 12:36:03 onkar-pc systemd[26653]: nagios-nrpe-server.service: Failed at step EXEC spawning /usr/sbin/nrpe: No such file or directory
May 10 12:36:03 onkar-pc systemd[1]: nagios-nrpe-server.service: Main process exited, code=exited, status=203/EXEC
May 10 12:36:03 onkar-pc systemd[1]: nagios-nrpe-server.service: Failed with result 'exit-code'.

This error

May 10 12:36:03 onkar-pc systemd[26653]: nagios-nrpe-server.service: Failed at step EXEC spawning /usr/sbin/nrpe: No such file or directory

Suggests that the NRPE application is not installed on the server anymore.
Does the file /usr/sbin/nrpe exist on the system?