6. User Management

Use the useradd command to add users

The only required parameter for useradd is the user's login name. The available options for the useradd command include:

• -c "comment here" Provides a description of the new user account
• -d home_dir Set the home directory used by the account, the default is /home/username
• -g group Set the primary group of the new user (must already exist). If this option is not used, a new group will be created (use the user name as the group name).
• -G grouplist Add the new user to the comma-separated list of supplementary groups (if -G is used in the subsequent usermod, make sure to use -aG, otherwise, the existing supplementary group will be deleted)
• -M Do not create a home directory
• -o Use -u uid to create a user with the same UID as another user account