Managing Users and Groups in Linux

Proper user management is key to a secure and organized server.

Adding a User

sudo adduser newusername

Deleting a User

# Delete the user but keep their home directory
sudo userdel newusername

# Delete the user AND their home directory
sudo userdel -r newusername

Adding a User to a Group

To add an existing user to a group (e.g., the `sudo` group):

sudo usermod -aG sudo existingusername