The Bash Shell

1
The Bash Shell

• Automating Your Life

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The Bash Shell

• The Bourne Again Shell was created for use in the
  GNU project. The GNU project was started by
  Richard Stallman of the Free Software Foundation
  in an effort to create a free version Unix for
  the ix86 along with all of the required
  utilities. Bash was intended to be the standard
  shell for this GNU system. When the complete GNU
  system failed to materialize Linux came on the
  scene and it adopted Bash as its standard shell.
  Bash is also available for pretty much every
  other Unix system and for Microsoft Windows.

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Three Default Open Files
Program
stdout
Buffer
stdin
stderr
4
Pipes
Program 1
stdout
Program 2
Pipe
stdin
stdout
Program 3
Pipe
stdin
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Shell/Environment Variables
Environment Variables
Shell Variables
Parent Process VAR1
Parent Process VAR1
Child Process VAR1
Child Process VAR????