Access Control Lists in linux
applicable for both files and folders getfacl filename # -m means modification setfacl -m u:oggy:rw filename # give user oggy read and write access to filename setfacl -m g:staff:rw filename # add permission for a group setfacl -m u:oggy filename # remove a entry setfacl -b filename # remove all entries # -R options recursively changes the acl for sub-directories