Linux in a Nutshell, Fifth Edition

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Chapter 6: The Bash Shell and Korn Shell

This is the Title of the Book, eMatter Edition

Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

--dump-strings

Same as -D.

--help

Print a usage message and exit successfully.

--init-file file

--rcfile file

Use file as the startup file instead of ~/.bashrc for interactive shells.

--login

Shell is a login shell.

--noediting

Do not use the readline library for input, even in an interactive shell.

--noprofile

Do not read /etc/profile or any of the personal startup files.

--norc

Do not read ~/.bashrc. Enabled automatically when invoked as sh.

--posix

Turn on POSIX mode.

--restricted

Same as -r.

--verbose

Same as set -v; the shell prints lines as it reads them.

--version

Print a version message and exit.

The remaining options to Bash and ksh are listed under the set built-in command.

Arguments

Arguments are assigned in order to the positional parameters $1, $2, etc. If the

first argument is an executable script, commands are read from it, and the

remaining arguments are assigned to $1, $2, etc. The name of the script is avail-

able as $0.

Syntax

This section describes the many symbols peculiar to the Bash and Korn shells. The

topics are arranged as follows:

• Special files

• Filename metacharacters

• Quoting

• Command forms

• Redirection forms

• Coprocesses (Korn shell only)