Nagios Support Forum

So I'm configuring Nagios to monitor remote servers. I have set up a Nagios monitoring device using Ubuntu 12.04 and it will be monitoring a server with Xubuntu 10.04.

I installed Nagios on the monitoring server and it is monitoring local host. It can also ping the Xubuntu box. My company has a wide variety of applications running on the box that we need to monitor. I pasted the commands that the previous engineer had written into /etc/nagios/nrpe.cfg on the Xubuntu box. But Nagios is saying that (No output returned from plugin).

How do I configure the custom commands on the Xubuntu box?

I've noticed that there are multiple file locations:

For instance there is /usr/local/nagios/plugins
/etc/nagios/
/etc/nagios-plugins

How do all of these relate to each other?

Any help would be greatly appreciated.

Are your commands defined properly in "/etc/nagios/nrpe.cfg"? On my Ubuntu box, nagios plugins are located in "/usr/lib/nagios/plugins", not in "/usr/local/nagios/plugins". It's probably the same with Xubuntu.
Did you eliminate any firewall issues?
What do you get when you run the following command on the client machine? What about the output of the following command, run from the plugins directory on the nagios server?

Remote Client


netstat -lpn |grep 5666
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN -

Server Machine

capc@cvg00-mon-02:~$ ./check_nrpe -H 192.168.1.205
-bash: ./check_nrpe: No such file or directory
capc@cvg00-mon-02:~$ /usr/local/nagios/plugins/check_nrpe -H 192.168.1.205
-bash: /usr/local/nagios/plugins/check_nrpe: No such file or directory
capc@cvg00-mon-02:~$ /usr/local/nagios/plugins/check_nrpe -H [email protected]
-bash: /usr/local/nagios/plugins/check_nrpe: No such file or directory
capc@cvg00-mon-02:~$

Server nagios.cfg file:


# Debian also defaults to using the check commands defined by the debian
# nagios-plugins package
cfg_dir=/etc/nagios-plugins/config

Try running:
If you get:
run: