C H A P T E R 13
Monitoring Your Network Using Nagios
The concept of network monitoring and the need for it should not be that hard to understand. When you have machines providing services and they are somehow critical to you, you will want to know their state and be alerted if a service is no longer available or is producing some sort of error. That is where monitoring comes into play.
Generally speaking, there are two types of monitoring. First, system monitoring is where you check statistics about things local to a computer system (CPU usage, available memory, filesystems, process load, the presence of certain processes, and so on). These ...