Munin
Link: http://munin.projects.linpro.no/
Briefly: rrdtool-based (http://oss.oetiker.ch/rrdtool/) performance monitoring. I just installed it on my Ubuntu box. Looks pretty neat!
Link: http://munin.projects.linpro.no/
Briefly: rrdtool-based (http://oss.oetiker.ch/rrdtool/) performance monitoring. I just installed it on my Ubuntu box. Looks pretty neat!