Chapter 6. Manage Local Users and Groups Summary

 

Summary

• The user account types in Linux are the superuser, system users, and regular users.

• A user has a primary group and might be a member of supplementary groups.

• The /etc/passwd, /etc/group, and /etc/shadow critical files contain user and group information.

• You can run commands as the superuser with the su and sudo commands.

• The useradd, usermod, and userdel commands manage users.

• The groupadd, groupmod, and groupdel commands manage groups.

• The passwd command manages passwords for users.

• The chage command displays and configures password expiration settings for users.