Adding Users:

• Command: adduser [username]

• Example: sudo adduser john

• Prompts for setting a password and user information.

Deleting Users:

• Command: deluser [username]

• Example: sudo deluser john

• Add the --remove-home option to delete the user’s home directory as well.

Modifying Users:

• Command: usermod [options] [username]

• Example: sudo usermod -aG sudo john (Adds john to the sudo group).

Switching Users:

• Command: su [username]

• Example: su john

Viewing User Information:

• Command: id [username]

• Example: id john (Displays user ID, group ID, and associated groups).