Installing Cacti on a CentOS 7 system

You're now going to install Cacti from source on a CentOS 7 system. You'll use CentOS 7 as it's 100% binary compatible with Red Hat Enterprise Linux 7, but in fact you can follow most of the installation process on other Linux distributions like Ubuntu or SUSE Linux as well. By installing from source you'll get some insight into the inner workings of Cacti, and it will also provide you with a system that most Cacti and plugin developers are used to. There are differences between a source installation and a yum/apt installation, but they will be described later on. Let's get started.