Nagios is a program that will monitor hosts and services on your
network, and to email or page you when a problem arises or is resolved.
Nagios runs on a unix server as a background or daemon process,
intermittently running checks on various services that you specify.

The actual service checks are performed by separate "plugin" programs
which return the status of the checks to Nagios.

This package contains additional nagios plugins provided by William Leibzon:
http://william.leibzon.org/nagios/
https://github.com/willixix/WL-NagiosPlugins