A Review of the Shell Prompt
Take a look at what happens when you log in to a UNIX system:
login: mori Password: Last login: Fri Mar 13 17:33:22 from :0 Sun Microsystems Inc. SunOS 5.6 Generic August 1997 $ _
The messages that appear upon login differ from system to system. In the preceding example, after the login messages are complete, the system displays a dollar sign ($), and the cursor sits next to it, waiting for input. The dollar sign is called a prompt because it prompts the user to enter a command.
The program that generates the dollar sign prompt is the shell. The shell program is a command-line interpreter that enables the user to enter commands. The purpose of this chapter is to cover the rules for entering UNIX commands to the shell. ...
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