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Nagios is a system and network monitoring application. It watches hosts and services that you specify, alerting you when things go bad and when they get better. Some of its many features include monitoring of network services (SMTP, POP3, HTTP, NNTP, ICMP, etc.), monitoring of host resources (processor load, disk usage, etc.), and contact notifications when service or host problems occur and get resolved (via email, pager, or user-defined method). For downloads and more information, visit the Nagios homepage.

Popularity #69, 2
Rating ★★★★★ (6)
Latest release 4.0.8
Aug. 12, 2014
(6 years, 1 month ago)


★★★★★ shikha

Excellent Monitoring tool. Lots of things to explore, it can monitor each and every component of DC, depends on how many logics and combinations one can apply.

no rating Knugen Reborn

Instead of using that worthless Nagios XI to get gui configuration, you can just use Nconf.

★★★★★ Fran

The best monitoring tool ever :D flexible and potent

★★★★★ Marco R.A. Bozzetti

An open source software very good, updated and flexible thanks to a lot of plugins.

★★★★★ James

Amazing tool you can monitor literally anything with this piece of software. Have been using the commercial version for over a year now and its rock solid.

★★★★★ Manish Kumar

Best Monitoring Tool

★★★★★ Steven Kent

... and if your manager hates the CLI, they have a commercial version that gives him a pretty webUI to use. (NagiosXI)

★★★★★ Steven Kent newer comment by this user ↑

Nagios is by far the best network monitoring tool. You can extend it to monitor anything you want, with tons of plugins already written. One of the best open source projects ever!

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