Redhat: SELINUX intro

SELinux

Security Enhanced Linux (SELinux) was developed by the NSA. It provides manidotry access control, beyond those controlled by basic file permissions and ACLs.

SELinux gives contexts to each file as either a subject, object or action. A subject is a process, an object is a file and an action is something done to an object by a subject.

To see the context of a file use the ls -Z command.