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Full Discussion: Escape characters in a variable
Top Forums Shell Programming and Scripting Escape characters in a variable Post 303033141 by RudiC on Saturday 30th of March 2019 05:27:36 PM
Old 03-30-2019
Please make it a habit to post your system's info in every single new thread, as you did thankworthily in your very first post in here: "Debian 9 64x - LXDE".


As for your problem: the bash builtin echo needs the -e option. man bash:
Quote:
If the -e option is given, interpretation of the following backslash-escaped characters is enabled.
Same holds true for the external /bin/echo comand on linux systems. It does not necessarily on other systems.



Code:
echo "$red_start This text should be red $color_end"
\e[91m This text should be red \e[0m
echo -e "$red_start This text should be red $color_end"
 This text should be red

This User Gave Thanks to RudiC For This Post:
int3g3r
 

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LEARN ABOUT CENTOS

echo

ECHO(1) 							   User Commands							   ECHO(1)

NAME

       echo - display a line of text

SYNOPSIS

       echo [SHORT-OPTION]... [STRING]...
       echo LONG-OPTION

DESCRIPTION

       Echo the STRING(s) to standard output.

       -n     do not output the trailing newline

       -e     enable interpretation of backslash escapes

       -E     disable interpretation of backslash escapes (default)

       --help display this help and exit

       --version
	      output version information and exit

       If -e is in effect, the following sequences are recognized:

       \     backslash

       a     alert (BEL)

            backspace

       c     produce no further output

       e     escape

       f     form feed

       
     new line

       
     carriage return

       	     horizontal tab

       v     vertical tab

       NNN  byte with octal value NNN (1 to 3 digits)

       xHH   byte with hexadecimal value HH (1 to 2 digits)

       NOTE: your shell may have its own version of echo, which usually supersedes the version described here.	Please refer to your shell's docu-
       mentation for details about the options it supports.

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report echo translation bugs to <http://translationproject.org/team/>

AUTHOR

       Written by Brian Fox and Chet Ramey.

COPYRIGHT

       Copyright (C) 2013 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for echo is maintained as a Texinfo manual.  If the info and echo programs are properly installed at your site,  the
       command

	      info coreutils 'echo invocation'

       should give you access to the complete manual.

GNU coreutils 8.22						     June 2014								   ECHO(1)
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