Nagios Support Forum

have a look at:https://www.nagios.com/products/nagios-xi/

You can download a free version that can monitor up to 7 hosts and 100 services. With a bit of knowledge of linux, it's easy to install.
There is even an online demo to play around with: https://nagiosxi.demos.nagios.com/nagio ... f&noauth=1

Answer:
There is a whole bunch of documentation that is written up by Nagios. If you ever do wanna setup a free XI server in linux then this is a good document to follow.
https://assets.nagios.com/downloads/nag ... -Linux.pdf

Thanks for providing these docs!

Thanks for sharing.
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Note that you can also get a 30-day free trial of the full enterprise version of Nagios XI with unlimited nodes and enterprise features.

This is a good version. I have signed up to use it
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