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Interactive Shell Use
When you use the shell interactively, you engage in a login session that begins when you log in and ends when you type exit or logout or press CTRL-D. [5] During a login session, you type in command lines to the shell; these are lines of text ending in RETURN that you type in to your terminal or workstation.
By default, the shell prompts you for each command with an information string followed by a dollar sign, though as you will see in Chapter 3, the entire prompt can be changed.
