User-mode Linux

UML (User Mode Linux) is one of the virtualization solutions provided by the Linux community. Guest kernels are regular ELF applications on a Linux system and, once invoked, launch a virtual guest as a single user process on the host. Support for UML has been integrated in the Linux kernel from version 2.6 onwards.

Gentoo specific resources

 * Gentoo developer guide for system testing with User-mode Linux