As a system administrator, you are probably spending quite some time configuring permissions for user and groups on your system. File permissions are already quite handy in order to give read, write or execute permissions to directories or files. This is exactly what access control lists, also shortened ACL, are solving on a Linux system. In today’s tutorial, we are taking a very close look at access control lists, what they are and how they are used in order to configure a Linux system properly.

Source: LXer – Access Control Lists on Linux Explained