Asking Linux to complete a command or filename for you

Considering that you do much more typing on the command line in Linux than you may normally do in a GUI environment, a feature that provides typing shortcuts wherever possible is great. Command completion is a function of the shell that completes filename and system commands.

The capability of the Linux file system to deal with practically unlimited sizes of filenames means that many filenames can become huge. Typing these long filenames can become cumbersome. Fortunately, with command completion, typing a command or a long filename is short work.

You may want to use command completion in two situations: to enter a command or to complete a filename.

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