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Page 29: Input and Output

Page 29

  Input and Output
  In the command line world, most programs are filters.
  Read data from "standard input"
  STDIN, file descriptor 0
  The keyboard
  Another program
  Write output to "standard output"
  STDOUT, file descriptor 1
  The monitor
  Another program
  An output file
  Write error output to "standard error"
  STDERR, file descriptor 2
  The monitor, etc

Copyright 2005, Bri Hatch of Onsight, Inc.

Presented at LFNW - LinuxFest Northwest, Bellingham, Washington, Apr 2005

Presentation created using vim and MagicPoint.