Change Hostname (linux server)

Edit;
/etc/hosts
/etc/sysconfig/network

Check apache's httpd.conf
vi /usr/local/apache/conf/httpd.conf
make necesarry changes on default hostname/virtual server

Additionally, you may need to re-update your Cpanel license key if you're using it.

Run;
/usr/local/cpanel/cpkeyclt

Restart the server
reboot or /sbin/reboot