The setfacl command
set file access control lists 2 examples from the lessons of the IVski Linux Playground — try them in the terminal next to them.
Options in the examples
-d, --default- All operations apply to the Default ACL.
Examples
setfacl -m u:ana:r /srv/reports/q3.txt
setfacl -d -m u:ana:rw /srv/reports