System Monitoring with OpenBSD - PhxBUG Nagios You may have used it already ... it used to be called Netsaint. What is it and how does it work? "Nagios is a host and service monitor designed to inform you of network problems ... blah blah blah a web page that tells you what's wrong with your stuff" daemon process always runs doesn't do the checks itself, uses 'commands' sort of just oversees everything configuration files Nagios gets it's flexibility (and headaches) from their flexibility servers, printers, hostgroups, commands, contacts ... everything is done here ... duh! commands small programs that do one thing lots come pre-packaged, but it's easy to add your own