In this tutorial we will show you how to install and configure LibreNMS on Ubuntu 16.04. LibreNMS is free and open source auto-discovering network monitoring tool based on PHP/MYSQL/SNMP. It???s a featured network monitoring system that provides support for wide range of network hardware and operating systems including, FreeBSD, Cisco, Linux, HP etc. LibreNMS is a community-based fork of the Observium network monitoring tool.