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Stdin, stdout and stderr

Stdin, stdout and stderr. File Device File Descriptor stdin 0 stdout 1 stderr 2. < - Redirecting Inputs. Any redirection that reads its input from stdin can have its input redirected to come from another file. Example $ cat remind

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Stdin, stdout and stderr

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  1. Stdin, stdout and stderr File Device File Descriptor stdin 0 stdout 1 stderr 2

  2. < - Redirecting Inputs Any redirection that reads its input from stdin can have its input redirected to come from another file. Example $ cat remind Your mother’s birthday is November 5. $ mail user3 < remind $ mail From user3 Mon July 15 11:30 EDT 1993 Your mother’s birthday is November 5. Enter Enter Enter

  3. > And >> - Redirecting Output Any command that produces output to stdout can have its output redirected to another file. Example $ date > date.out $ who > date.out $ who >> who.log $ ls >> who.log Enter Enter Enter Enter

  4. 2> and 2>> - Redirecting Errors Any command that produces error messages to stderr can have those messages redirected to another file. Example $ cp 2> cp.err $ cp 2>> cp.err $ cat cp.err Enter Enter Enter

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