104.5 – Manage file permissions and ownership

Weight

5

Description

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.

Files, Terms, and Utilities

• chmod

• umask

• chown

• chgrp