An Overview of Free/Open Source Monitoring Software Packages
Software Packages Reviewed
MRTG: The Multi Router Traffic Grapher
What MRTG Monitors
How MRTG Works
MRTG Resource Requirements
MRTG Installation Notes
MRTG Notes
Big Brother System and Network Monitor
How Big Brother Works
The Big Brother Display
Big Brother Requirements
Big Brother Installation
Big Brother Notes
Big Brother Integration Options
OpenNMS
What OpenNMS Monitors
How OpenNMS Works
OpenNMS Requirements
OpenNMS Installation
OpenNMS Notes
Nagios
What Nagios Monitors
Nagios Features
Nagios Requirements
Nagios Installation
Nagios Notes
mon- Service Monitoring Daemon
SNIPS (aka NOCOL)
Other Resources