|Original author(s)||Ethan Galstad|
|Initial release||May 10, 2002|
|Stable release||3.2.3 / October 3, 2010|
|License||GNU General Public License|
Nagios (how to say: /ˈnɑːdʒioʊs/) is a popular open source computer system and network monitoring application software. It watches hosts and services which the owner specifies, alerting the owner when things go bad and again when they get better.
Nagios, originally created under the name NetSaint, was written and is currently maintained by Ethan Galstad, along with a group of developers actively maintaining both official and unofficial plugins.