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→Redirection (Standard Input, Standard Output, Standard Error)
'''Standard input''' ('''stdin''') is a term which describes from where a command receives input.<br>
This would apply only to Unix/Linux commands that accept stdin input (like ''cat'', ''more'', ''less'', ''sort'', ''grep'', ''head'', ''tail'', etc.).<br>
With the examples below, standard input is being sent into the command from the text file.
