Though Red Hat, Ubuntu and Linux are rivals, yet all of them agree in one point - Docker, a container technology. Docker is potential as well as disruptive in different aspects. Now the question is- can containers with Docker be the next great revolution in virtualization and the cloud? To know the answer of this question, go through the article written by Steven J. Vaughan-Nichols, writer of technology.

http://www.zdnet.com/red-hat-ubuntu-and-docker-container-virtualization-goes-mainstream-7000028610/

According to OpenStack user survey, Ubuntu Linux is the most popular OpenStack operating system. According to Mark Shuttleworth (founder of Canonical, Ubuntu's parent company), 55 percent of OpenStack operating systems are on Ubuntu. To know more about synchronization of Ubuntu and OpenStack, go through the article by Steven J. Vaughan-Nichols, writer about technology.

http://www.zdnet.com/openstacks-top-operating-system-ubuntu-linux-7000027360/