Candidates should be able to control file access through the proper use of permissions and ownerships. Key Knowledge Areas: * Manage access permissions on regular and special files as well as directories. * Use access modes such as suid, sgid and the sticky bit to maintain security. * Know how to change the file creation mask. * Use the group field to grant file access to group members. The following is a partial list of the used files, terms and utilities: * chmod * umask * chown * chgrp
