How to install Observium on Ubuntu 14.04

In this tutorial we will cover the steps needed for installing Observium on an Ubuntu 14.04 VPS.
Observium is a PHP/MySQL-based network observation and monitoring system which supports a wide range of hardware platforms and operating systems including Cisco, Windows, Linux, HP, Juniper, Dell, FreeBSD, Brocade, Netscaler, NetApp and many more.