<div dir="ltr"><div>Theres also Icinga (<a href="http://www.icinga.org">www.icinga.org</a>) From the website, "<a title="Icinga 2" href="https://www.icinga.org/icinga/icinga-2/">Icinga 2</a> is a network monitoring system and parallel development branch to <a title="Icinga 1" href="https://www.icinga.org/icinga/icinga-1/" class="">Icinga 1</a>.
It is a core framework replacement (no GUI) that seeks build on the
success of Icinga 1 and deal with shortcomings inherited from Nagios as a
fork. " <br> </div></div>