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Full Discussion: Escape Characters are driving me crazy!
Top Forums Shell Programming and Scripting Escape Characters are driving me crazy! Post 302345945 by troym72 on Thursday 20th of August 2009 04:13:21 PM
Old 08-20-2009
Escape Characters are driving me crazy!
Hi everyone,

Is there anywhere I can find a complete table of all characters that must be escaped by the various UNIX shells and scripting languages?

It seems every command/shell/scripting language has different rules about what characters must be escaped.

I do a lot of searching and replacing with files that contain all kinds of characters like ^{}[]()!@#$%&*_+=|\<>.,?~`:";' Did I cover them all?

Can anyone point me to a reference list/table of some kind that I can use. I would love to be able to confidently use sed, awk, perl, ksh or whatever to do string manipulation using these characters without constantly having to guess and experiment with what has to be escaped.

Thanks so much!!
 

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LEARN ABOUT DEBIAN

chsh

CHSH(1) 							   User Commands							   CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
	   Display help message and exit.

       -R, --root CHROOT_DIR
	   Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -s, --shell SHELL
	   The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
	   User account information.

       /etc/shells
	   List of valid login shells.

       /etc/login.defs
	   Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

shadow-utils 4.1.5.1						    05/25/2012								   CHSH(1)
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