Editing Nagios (section)

{{short description|Computer system and network monitoring application software}}
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{{Advert|date=February 2022}}
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{{Infobox software
| name = Nagios Core
| logo = Nagios logo.svg
| screenshot = 
| caption = 
| author = Ethan Galstad and [http://www.nagios.org/about/team others]
| developer = 
| released = {{release date and age|2002|03|01}}<ref>{{cite web
 | url=http://www.netsaint.org/changelog.php
 | title=NetSaint Change Log
 | date=2002-03-01
 | archive-url=https://web.archive.org/web/20060501150621/http://www.netsaint.org/changelog.php
 | archive-date=2006-05-01
 | url-status=dead}}</ref>
| latest release version = 4.5.5
| latest release date = {{release date and age|2024|09|17}}<ref>{{cite web
 | url=https://github.com/NagiosEnterprises/nagioscore/releases
 | title=Releases - NagiosEnterprises/nagioscore
 | website=[[GitHub]]
 | access-date=26 October 2022}}</ref>
| repo = {{URL|https://github.com/NagiosEnterprises/nagioscore}}
| programming language = [[C (programming language)|C]]
| operating system = [[Cross-platform]]
| platform = 
| language = 
| genre = [[Network monitoring]]
| license = [http://sourceforge.net/p/nagios/nagioscore/ci/master/tree/LICENSE GPLv2]
| website = {{url|https://www.nagios.org}}
}}

'''Nagios''' {{IPAc-en|ˈ|n|ɑː|ɡ|iː|oʊ|s}} is an [[event monitoring]] system that offers monitoring and alerting services for servers, switches, applications and services. It alerts users when things go wrong and alerts them a second time when the problem has been resolved. 

Ethan Galstad and a group of [[Software developer|developers]] originally wrote Nagios as ''NetSaint''.<ref name="Open source Monitoring - Icinga vs Nagios">{{cite web|url=http://sosopensource.com/325.html |title=Open Source Monitoring: Icinga vs Nagios Sos open source |publisher=Sosopensource.com |date=2010-11-25 |access-date=2020-05-26| quote=Nagios – whose name is a recursive acronym (“Nagios Ain’t Gonna Insist On Sainthood”) ironically refers to the original name NetSaint changed to avoid trademark troubles – is among the most popular open source network management tools and application.}}</ref> {{As of | 2015}}, they actively maintain both the official and unofficial [[Plug-in (computing)|plugins]]. Nagios is a [[recursive acronym]]: "Nagios Ain't Gonna Insist On Sainthood"<ref name="NagiosFAQ">{{cite web
| url         = http://support.nagios.com/knowledgebase/faqs/index.php?id=52&catid=35&faq_id=2
| title       = FAQ Database: Miscellaneous: What does Nagios mean?
| last        = Galstad
| first       = Ethan
| date        = 2009-08-24
| work        = Nagios: Frequently Asked Questions
| publisher   = Nagios Enterprises, LLC
| quote       = The official meaning is that N.A.G.I.O.S. is a recursive acronym which stands for "Nagios Ain't Gonna Insist On Sainthood".
| access-date  = 2014-06-02}}</ref> – "sainthood" makes reference to the original name ''NetSaint'', which changed in response to a legal challenge by owners of a similar trademark.<ref name="Fosdem2005Galstad">{{cite web
| url         = http://archive.fosdem.org/2005/index/interviews/interviews_galstad.html
| title       = 2005-02-22 - Ethan Galstad
| date        = 2005-02-22
| work        = [[FOSDEM]] 2005
| quote       = Although we were able to eventually reach an amicable agreement on my future use of the name "NetSaint", I felt it was prudent to change the name in order to prevent any future mishaps.
| access-date  = 2014-06-02}}</ref> "[[Agios]]" (or "hagios") also transliterates the Greek word ''άγιος'', which means "saint".

Nagios was originally designed to run under [[Linux]], but it also runs on other [[Unix]] variants. It is [[free software]] licensed under the terms of the [[GNU General Public License]] version 2 as published by the [[Free Software Foundation]].