A text-based, dial-up login, also known as a shell account, looks much the same as a text-
based login at a PC running Linux. Details about setting up Linux to answer the phone and provide a login prompt via a modem are in Chapter 18. Using dial-up access has some limitations, such as the inability to use virtual consoles. From a shell account, however, you can start programs in the background (using the ampersand, &), run programs after logging out with the nohup command, or use the screen command to simulate virtual terminals (an approach that works much like using virtual consoles). For more information on different shells included with Linux, see Chapter 15.
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