How to implement login and exit in Linux system

1. After the system starts successfully, the screen displays the following prompt: "localhost login:". Enter a username, such as philcheng, and then press Enter.

#2. You need to enter a password. The password will not be displayed on the screen when you enter it. Press Enter. When the user correctly enters the user name and password, he can legally enter the system.

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3. Exit the system: Enter the command: exit. That is, go back to the state before login.

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