$ vi /etc/sysconfig/network-scripts/ifcfg-eth0
 
 $ vi /etc/sysconfig/network
 
 HOSTNAME="hostname<FQDN>"
 DHCP_HOSTNAME="hostname<FQDN>"

 $ vi /etc/rc.local

 #!/bin/bash
 # THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
 #
 # It is highly advisable to create own systemd services or udev rules
 # to run scripts during boot instead of using this file.
 #
 # In contrast to previous versions due to parallel execution during boot
 # this script will NOT be run after all other services.
 #
 # Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
 # that this script will be executed during boot.

 touch /var/lock/subsys/local
 hostnamectl --transient set-hostname "hostname"
 
 #exit vi <:wq>
 
 $ chmod +x /etc/rc.d/rc.local <This will make the file unchanged even after reboot>
 
 $ Reboot
 
 *You are ready to go the Cpanel installation for CentOS7 :)*