Internal

Sequence

Change machine name.
Pick an available IP address from IP address spreadsheet and update IP address spreadsheet.
Change the IP address. On VirtualBox, the internal host-only IP interface is configured in ifcfg-eth0.
If multicast was enabled and a static multicast added, update the IP address of the interface in /etc/sysconfig/network-scripts/route-*.
Change machine ID.
yum -y update
Install various public keys in ~/.ssh/authorized_keys.
Change the root password.
Configure log rotation.
Make sure the guest starts automatically on virtualization host reboot.
Manual start/stop scripts in ~/environments/.../start-*|stop-*
Secure instance.