Other tools for network monitoring
Nagios is not the only tool for monitoring systems and networks. The most well-known "competitor," perhaps on an equal footing, is Big Brother (BB). Despite a number of differences, its Web interface serves the same purpose as that of Nagios: displaying to the administrator what is in the "green area" and what is not.
The reason why the author uses Nagios instead of Big Brother lies in the license for Big Brother, on the BB homepage[3] called Better Than Free License: the product continues to be commercially developed and distributed. If you use BB and earn money with it, you must buy the software. The fact that the software, including the source code, may not be passed on or modified, except with the explicit ...
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