Nagios

Debian

aptitude install nagios3 nagios-plugins nagios-nrpe-plugin nagios3-doc

Set domain if you have one (else leave default) and set login user and password (it should prompt your for both)

Notes

• http://www.howtoforge.com/installing-nagios-on-debian-lenny-and-monitoring-a-debian-lenny-server
• http://www.the-tech-tutorial.com/wp-content/uploads/2011/07/nagios-config.png