Video: PentOS "Just Add Water" Private Cloud Released - ReadWriteCloud | Cloud Central | Scoop.it
The creator of the Piston Enterprise Operating System, or PentOS, Joshua McKenty one-upped himself. He fit an almost entirely self-provisioning cloud operating system for a common rack of servers, onto a USB thumb drive. You plug the thumb device into a PC, edit maybe three lines of a text configuration file, save it, unplug it, plug it into the main server in the rack, and turn it on.

 

Video's worth a watch!