bash: Use a file as standard input to a command.
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Take into account the main readme for this section. README first.
The default standard input on Linux is the keyboard, but a file can also be used.
Standard input using keyboard. When you type in a echo command for example:
$ echo blue moon blue moon
Commands can also take standard input from a file.
$ sort < inputfile I said blue moon of Kentucky Keep on shining These are lines used as input
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