NSA Security-Enhanced Linux (SELinux) is an implementation of a flexible mandatory access control architecture in the Linux operating system.

The SELinux architecture provides general support for the enforcement of many kinds of mandatory access control policies, including those based on the concepts of Type EnforcementĀ®, Role- Based Access Control, and Multi-Level Security. Background information and technical documentation about SELinux can be found at http://www.nsa.gov/selinux.