Nagios (pronounced /ˈnɑːɡi.oʊs/) is a popular open source computer system and network monitoring software application. It watches hosts and services, alerting users when things go wrong and again when they get better.

[[Refer to Wojciech's book, various articles.]]

[[Refer to [moodss] connection.]]

http://www.ibm.com/developerworks/aix/library/au-nagios/%|%IBM article with Tcl example%|%

http://nagiosplug.sourceforge.net/developer-guidelines.html%|%Plugin Development Guidelines%|%
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