Linux containers (LXC) technology has taken off with Docker https://www.docker.com/ <ref>[http://opensource.com/business/14/7/interview-j%C3%A9r%C3%B4me-petazzoni-docker See the interview on opensource.com]</ref> <ref>more info from Wikipedia [[wp:Docker_(software)]]</ref> which was released as open source in March 2013. RedHat and others have collaborated with the corporate backer to the technology seemingly to compete with Canonical's JuJu https://juju.ubuntu.com/ and Charm technology which also is based on Linux containers. Linux containers are built into the linux kernel, and so offer a lightweight native method of virtualization compared to more traditional (heavyweight) virtualization techniques like VMWare.
https://www.docker.com/
== Installing on Ubuntu ==
https://docs.docker.com/installation/ubuntulinux/ Apparently the packaged version is old (not surprising). So, add the Docker repo, and install <code>lxc-docker</code>
Note: it's only supported on 64-bit Ubuntu
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