User and Group Management is one of the most important responsibilities of a Linux System Administrator. Every Linux system relies on users and groups to control access to files, directories, applications, and system resources. Proper user management ensures security, accountability, and efficient administration of servers in enterprise environments.

In this lesson, students will learn how to create, modify, manage, and remove users and groups in Linux. They will also understand how Linux authenticates users, stores account information, and uses groups to simplify permission management.

By the end of this lesson, learners will be able to confidently manage user accounts, assign group memberships, enforce security policies, and administer multi-user Linux systems.