[wellylug] How to monitor CPU/Memory/Disk usage

[Chris Hodgetts]

Nagios is your friend :)

You can be alerted when services such as disk / memory or whatever gets 
to a critical or warning state

It's also built as a debian package

Jamie Dobbs wrote:
> I'm a little worried that my 'mail server' PC is getting overloaded and I
> am losing emails etc., or that I am having delays in outgoing mail.
> How can I set up some sort of monitoring to look at CPU, memory and disk
> usage - preferably in a graphical format.
> I seem to recall that cricket and/or mrtg might be able to do this but
> searching around has not shown me any way to monitor a local PC's stats -
> can anyone point me in the right direction?
> I'd like to be able to do this on Debian and Gentoo as there are a couple
> of other PCs I'd like to be able to monitor as well.
> 
>