Linux Containers (LXC) provide a Free Software virtualization system for computers running GNU/Linux. This is accomplished through kernel level isolation using CGroups and namespaces. It allows one to run multiple virtual units simultaneously. Those units, similar to chroots, are isolated and utilize available resources efficiently, as they run on the same kernel.

Visit https://linuxcontainers.org/ for all related information.

Full support for LXC (including userspace tools) is available since the Debian 6.0 “Squeeze” release.