Source – opensourceforu.com Cacti is written in PHP and uses the MySQL database as a backend. It uses the RRDtool (Round-Robin Database tool) to handle time series data and has built-in SNMP support. Cacti has been released under the GNU General Public License. Figure 1: Licence agreement Setting up Cacti We will use a CentOS 6.8 virtual machine (VM) running on KVM to set up Cacti. Just for this demonstration, we will disable SELinux. You will need to set the following