The command line is one of the most useful tools for a programmer in the long run, but it is one that is tucked and hidden away from ordinary users. With the command line, instead of pointing and clicking to tell the computer what to do, you type commands that the computer reads and then runs. For the most part, each command is actually its own tiny (or not so tiny) program that does just one job for you. It is like a mini programming language that executes as you type each line.
B.1 Why Use the Command Line
It may sound ...
