Add new user under Linux, switch User login

How do I add a user under Linux? And the successful exit user login? and switch User login?

The steps are as follows:

2. Command line enter adduser user name (e.g. LANP) Enter,(note: Here Linux does not display any information);

4. Then enter the passwd user name carriage return;

6. Prompt you to enter a new password, as well as the password entered after the confirmation password;(note that Linux is not displayed when you enter a password)

8. An authentication token has been successfully updated to represent the user and the creation was successful;

10. Exit user Login, directly logout enter;

12. Root switch to a normal user, with the command su user name (su is the switch user), if the normal user switch to root, then Su returns ( or Su-Enter, this represents the root variable passed over );

    
    

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Add new user under Linux, switch User login