How many times you have been hit by unit tests failing because of environment differences between you and other team members? How easy is it to build your project and have it ready for development? Vagrant provides a method for creating repeatable development environments across a range of operating systems for solving these problems. It is a thin layer that sits on top of existing technologies that allows people working on a project to reproduce development environments with a single command.

http://www.linuxjournal.com/content/vagrant

Keith