User Management

User management controls local identities, group membership, and permissions enforcement on a Linux system.

📄️ Creating, Deleting, Updating Accounts

User accounts are managed through system databases stored in /etc/passwd, /etc/shadow, and /etc/group.

Groups define permission sets shared among users. Primary group is assigned at login; supplementary groups allow additional access.

Linux uses POSIX file permissions with owner, group, and other classes.