Ubuntu Quickstart:

This guide is intended to provide you with simple instructions on how to install Nagios from source (code) on Ubuntu and have it monitoring your local machine inside of 20 minutes. No advanced installation options are discussed here - just the basics that will work for 95% of users who want to get started.

Trackback link - http://www.dailycupoftech.com/2007/05/08/quickly-install-nagios-on-ubuntu/trackback/
Tim Fehlman