Bourne Again SHell: Difference between revisions
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In functionality ''bash'' goes well beyond the original Bourne shells and closely matches the extensions of David Korn's "Korn shell" (''ksh'') but lacks built-in support for "associative arrays" and co-processes. However, ''bash'' also adds a number of interactive features drawn from Bill Joy's [[C SHell]] (including the many "bang expansion operators" for things like !! (expand to entire previous command), !-2 (expand to penultimate command), !$ (expand to last argument of previous command) etc). |
In functionality ''bash'' goes well beyond the original Bourne shells and closely matches the extensions of David Korn's "Korn shell" (''ksh'') but lacks built-in support for "associative arrays" and co-processes. However, ''bash'' also adds a number of interactive features drawn from Bill Joy's [[C SHell]] (including the many "bang expansion operators" for things like !! (expand to entire previous command), !-2 (expand to penultimate command), !$ (expand to last argument of previous command) etc). |
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[http://www.gnu.org/software/bash/ GNU Bash homepage] |
* [http://www.gnu.org/software/bash/ GNU Bash homepage] |
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[http://tldp.org/LDP/ |
* [http://tldp.org/LDP/a bs/html/ Advanced Bash-Scripting Guide] |
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* [[wp:bourne again shell]] |
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Revision as of 17:19, 30 August 2009
bash (the "Bourne Again SHell") is the GNU implementation of a Unix shell which is intended to be compatible with the original UNIX shell (/bin/sh) by Stephen Bourne. bash was primarily written and is maintained by Brian Fox and Chet Ramey. The name follows an FSF (Free Software Foundation) tradition for whimsical and pun-referential names.
In functionality bash goes well beyond the original Bourne shells and closely matches the extensions of David Korn's "Korn shell" (ksh) but lacks built-in support for "associative arrays" and co-processes. However, bash also adds a number of interactive features drawn from Bill Joy's C SHell (including the many "bang expansion operators" for things like !! (expand to entire previous command), !-2 (expand to penultimate command), !$ (expand to last argument of previous command) etc).