Security-Enhanced Linux (SELinux) is a Linux variant that implements a variety of security policies, including U.S. Department of Defense style mandatory access controls, through the use of Linux Security Modules (LSM) in the Linux kernel. Since Red Hat introduced SELinux with its Enterprise offerings, SELinux is now widely used in government, military and often commercial environments. Today there is no closed source backup vendor that supports SELinux. Amanda, however, works with SELinux policies very well.