July 16
About Unicenter NSM as a commercial system monitoring tool I've already written. In the open source area has in recent years to the project NAGIOS formed a large community.
The monitoring framework provides the basis of numerous plugins the same, if not a wider range of functions for monitoring network and system resources. However, it is missing right now in a graphical interface to configure.
So if you are not afraid of the command line and wants to know what is happening in his private or official network, the Nagios is highly recommended. A good guide is in this Heise article .
