[ Thanks to Falko
Timme for this link. ]
“In this article I will describe how you can monitor
your Debian Lenny server with munin and monit. munin produces nifty
little graphics about nearly every aspect of your server (load
average, memory usage, CPU usage, MySQL throughput, eth0 traffic,
etc.) without much configuration, whereas monit checks the
availability of services like Apache, MySQL, Postfix and takes the
appropriate action such as a restart if it finds a service is not
behaving as expected. The combination of the two gives you full
monitoring: graphics that lets you recognize current or upcoming
problems (like “We need a bigger server soon, our load average is
increasing rapidly.”), and a watchdog that ensures the availability
of the monitored services.“Although munin lets you monitor more than one server, we will
only discuss the monitoring of the system where it is installed
here.“This tutorial was written for Debian Lenny, but the
configuration should apply to other distributions with little
changes as well.”