Matt - System Monitoring

Allan & Kris

My question is about server monitoring. What do you guys use currently for monitoring all of your servers? Allan I have heard you talk about Nagios before. Is there any tutorials/how-to articles to get Nagios monitoring on a FreeNAS server? I want to monitor, CPU, RAM, Disk, etc. I'm comfortable on command line (ssh) just want to do it correctly.

Thanks in advance. Love all of the things that you guys contribute to the community!

Matt