How to Install Icinga 2 Monitoring Software on Ubuntu 22.04 LTS
Icinga2 is a free, open-source network monitoring software that can check the availability of resources from the network and notifies users of outages. In the following tutorial, you will learn to install Icinga2 on a Ubuntu 22.04 server and how to connect it to a client node.
Source: Howtoforge Linux Howtos und Tutorials