A very large proportion of all the work most users do from the command line, even advanced users, consists of few key activities and a fairly small number of common commands. Most of these have to do with locating, listing, creating, editing, and deleting files and directories. This section provides an overview of the most common file- and directory-related tasks and the commands that you use to perform them.
Notice that most of these very common commands have short two-, three-, or four-letter names. Note also that you can use the shell's command completion feature to type a few letters, press the Tab key, and bash completes the command (for example, type ema and press the Tab key, and bash displays the command emacs).
If you're unfamiliar with the basic commands used in the rest of this chapter, your best plan is to experiment. Just as the best way to learn a language is to speak it, the best way to learn Linux commands is to use them. Experiment as freely as possible and play.
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