Summary of bash Features

Summary of bash Features

bash is a backward-compatible evolutionary successor to the Bourne shell that includes most of the C shell's major advantages as well as features from the Korn shell and a few new features of its own. Features appropriated from the C shell include:

·                 Directory manipulation, with the pushd , popd , and dirs commands.

·                 Job control, including the fg and bg commands and the ability to stop jobs with CTRL-Z.

·                 Brace expansion, for generating arbitrary strings.

·                 Tilde expansion, a shorthand way to refer to directories.

·                 Aliases, which allow you to define shorthand names for commands or command lines.

·                 Command history, which lets you recall previously entered commands.

bash 's major new features include:

·                 Command-line editing, allowing you to use vi- or emacs -style editing commands on your command lines.

·                 Key bindings that allow you to set up customized editing key sequences.

·                 Integrated programming features: the functionality of several external UNIX commands, including test , expr , getopt , and echo , has been integrated into the shell itself, enabling common programming tasks to be done more cleanly and efficiently .

·                 Control structures, especially the select construct, which enables easy menu generation.

·                 New options and variables that give you more ways to customize your environment.

·                 One dimensional arrays that allow easy referencing and manipulation of lists of data.

·                 Dynamic loading of built-ins , plus the ability to write your own and load them into the running shell.

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