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Full Discussion: Different behavour with "tr"
Top Forums Shell Programming and Scripting Different behavour with "tr" Post 302740071 by jville on Wednesday 5th of December 2012 01:01:30 PM
Old 12-05-2012
Different behavour with "tr"

I am getting different output with the 'tr' command in bash
I am using
Linux:
Red Hat Enterprise Linux Server release 5.3 (Tikanga)
Bash version:
GNU bash, version 3.2.25(1)-release (x86_64-redhat-linux-gnu)

Code:
$ x=`echo XXx | tr '[a-z]' '[A-Z]' `
$ echo $x
XXX

$ y=`echo XXx | tr [:lower:] [:upper:] `
$ echo $y
XXx

 

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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: NNN the character whose ASCII code is NNN (octal) \ backslash a alert (BEL)  backspace c produce no further output f form feed new line carriage return horizontal tab v vertical tab 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. AUTHOR
Written by Brian Fox and Chet Ramey. REPORTING BUGS
Report echo bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> COPYRIGHT
Copyright (C) 2009 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 7.1 July 2010 ECHO(1)
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