A Practical Introduction to Docker Containers

Docker has quite an amount of buzz around it today because it makes so many things easy that were difficult with virtual machines.

Docker containers makes it easy for Developers, Systems Administrators, Architects, Consultants and others to quickly test a piece of software in a container; much quicker than a virtual machine, and using less resources. The average command in Docker takes under a second to complete…”

http://developerblog.redhat.com/2014/05/15/practical-introduction-to-docker-containers/