Nagios server monitoring is one of the best – if not the best open source server, switch and router monitoring platforms I’ve used. Best of all, because it is open source, it is free. I’ve documented here the method I used to get Nagios 3. Introduction If you follow these instructions the plan is you’ll end up with: Nagios and the plugins will be installed underneath /usr/local/nagios Nagios will be configured to monitor a few aspects of your local system (CPU load, disk usage, etc.) The Nagios web interface will be accessible at http://localhost/nagios/ or at http://yourWANip/nagios/ Before you start You’ll need to have a command line editor – I recommend Putty for this. Its easier to be logged on as root but if you are not, use the sudo command before typing a command. I’ve put … Read entire article »