To use the ACL feature in Linux, which commands do you use?

The ACL (Access Control List) feature in Linux allows for more granular permissions on files and directories than the standard owner-group-other model. To manage ACLs, specific commands are utilized. The correct pair of commands for setting and retrieving ACLs are "setfacl" and "getfacl".

The "setfacl" command is used to set or modify access control lists on files and directories, thereby allowing you to specify permissions for individual users or groups beyond the basic owner and group permissions. This is essential in environments where you need to grant specific privileges to users without changing the ownership of a file or directory.

Conversely, the "getfacl" command is employed to retrieve and display the access control lists associated with a file or directory, providing insight into who has what permissions, including any special ACLs that might be in place.

Other options mentioned, such as "chmod", "chown", and "chgrp", are traditional permission management commands used in Linux, but they do not support the specific features related to ACLs. "chmod" adjusts standard permissions, "chown" changes the owner of a file or directory, and "chgrp" alters the group ownership, but they do not interact with ACLs directly.