Nagios Support Forum

We don't want to spend more time in investigating the problem on this server, let's create a new server.

Can you guide with standard process of installing a fresh copy of Nagios XI?

The manual install instructions can be found here: https://assets.nagios.com/downloads/nag ... ctions.pdf

As stated in the doc, Nagios Enterprises highly recommends and will only support installing Nagios XI on a newly installed, clean system (a
bare minimal install with nothing else installed or configured). Please make sure this is the case before continuing, as modifications made can cause issues with package versions if not made carefully.