adduser command adds a user to the system. In order to add a new user type:
sudo adduser <user_name>
sudo adduser tom
After typing the above command, you will be prompted to enter details about the new user, such as new password, user Full name, etc.
Below is the information that user will be asked to fill in order to add a new user:
Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully Changing the user information for tom Enter the new value, or press ENTER for the default Full Name : Test User Room Number : Work Phone : Home Phone : Other : Is the information correct? [Y/n] y