Users, Groups & Permissions

Creating and modifying user accounts, groups, password aging, and file permissions (including SUID/SGID/sticky and POSIX.1e ACLs). Roughly 15% of the EX200 exam.

User & group management

New

Create users with specific UIDs, primary and supplementary groups, modify account attributes, lock/unlock, and manage password aging with chage.

~35 min~50% of domain🔒 Sign inuseraddusermoduserdelgroupadd

Permissions, special bits & ACLs

New

Standard rwx permissions, chown/chgrp, SUID/SGID/sticky bits for collaborative directories, and POSIX.1e ACLs with setfacl.

~40 min~50% of domain🔒 Sign inchmodchownchgrpsetfacl

Privileged access (sudo)

New

Grant and restrict root privileges: the wheel group, /etc/sudoers.d drop-ins, per-command sudo rules, and NOPASSWD — the "configure privileged access" exam objective.

~25 min~35% of domain🔒 Sign insudosudoersvisudowheel