Unix in a Nutshell, Fourth Edition

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Here is a list of URLs for the source code for different shells.

Shell

Location

Bash

ftp://ftp.gnu.org/gnu/bash

Bash source code patches

ftp://ftp.gnu.org/gnu/bash/bash-3.0-patches

Ksh93

http://www.research.att.com/sw/download/

The Z Shell

http://www.zsh.org

The Public Domain Korn Shell

http://web.cs.mun.ca/~michael/pdksh/

Tcsh

http://www.tcsh.org

The Public Domain Korn shell is mostly compatible with ksh88, and is usually the version of ksh shipped with GNU/Linux systems. The Z shell (zsh) has many features of the Bourne shell, Bash, and the Korn shell, and a plethora of features unique to it.

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