Nagios
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Nagios
I use Nagios for monitoring servers and services.
Check Configuration
Every time you modify your configuration files, you should run a sanity check on them. It is important to do this before you (re)start Nagios, as Nagios will shut down if your configuration contains errors.
In order to verify your configuration, run Nagios with the -v command line option like so:
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
NRPE
Nrpe is a daemon installed on client machines used for system information retrieval. Specific installation instructions will be provided later, until then look at: http://linuxmanage.com/nagios-check-host-status-with-nrpe-on-debian-lenny.html
Verify NRPE is Responding
/usr/local/nagios/libexec/check_nrpe -H <hostname or address>
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