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Full Discussion: slashes in a bash shell
Top Forums Shell Programming and Scripting slashes in a bash shell Post 10568 by Perderabo on Friday 16th of November 2001 10:35:30 AM
Old 11-16-2001
Backslash is special to the shell. It quotes the next character. For example:
echo ;
will not work because the shell sees the semicolon as a separator and will not pass it to the echo command. So to echo a semicolon we need to do:
echo \;
But what if we wanted to echo a backslash? We then we need to do this:
echo \\

So your four backslashes are needed just to deliver two backslashes to the sed program.

But sed also uses the backslash specially. And so if you really want sed to use a backslash as an ordinary character, you need to feed sed a double backslash as well.

If it makes you feel any better, 8 backslashes is no record.
 

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LEARN ABOUT SUNOS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The  following  default	shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh,
       /bin/tcsh,  /bin/zsh,  /sbin/jsh,  /sbin/sh,  /usr/bin/bash,  /usr/bin/csh,  /usr/bin/jsh,  /usr/bin/ksh,  /usr/bin/pfcsh,  /usr/bin/pfksh,
       /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list.

       Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)).

FILES

       /etc/shells	       lists shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.10							    4 Jun 2001								 shells(4)
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