Comments on: Shell Scripting: Convert Uppercase to Lowercase

By: chandra

chandra — Wed, 07 Sep 2011 14:17:36 +0000

Nice example it helped my issue

By: mdinaz

mdinaz — Thu, 11 Aug 2011 15:54:03 +0000

This doesn’t work with the old Solaris version of tr, you need to use the GNU version in /usr/xpg4/bin on Solaris.

By: Riot

Riot — Sat, 07 May 2011 18:52:28 +0000

In bash 4, the easiest and by far the most elegant way to do this for lowercase is:

echo ${string,,*}

and for uppercase:

echo ${string^^*}

By: migyudtfr

migyudtfr — Sun, 06 Mar 2011 20:11:44 +0000

#! /bin/bash
typeset -l string
string="HELLO WORLD"
echo $string

By: irshad

irshad — Tue, 07 Dec 2010 17:46:08 +0000

hey guys your info has been really helpful. I m an Mca student and am vry good in C lang. Since it is embedd in ma brain, i feel it very hard to learn another script lang llike Unix but i want to perforn in Unix too. Could please help me by providn som basic tips so i can learn shell progming quickly.
Ur help vl b greatly appreciated

By: Anil

Anil — Fri, 26 Nov 2010 07:39:22 +0000

cat | tr [[:upper:]] [[:lower:]]

By: Joseph

Joseph — Mon, 01 Nov 2010 15:39:50 +0000

Thanks for this opportunity, to ask this question, This is my question.
HOW DO I TRANSLATE TEXT IN A FILE FROM ONE CASE TO ANOTHER.

By: reneuend

reneuend — Wed, 16 Sep 2009 14:56:18 +0000

If you just want to change the case of the file extension, here is one way to do it:

for f in *.TXT; do mv $f `basename $f .TXT`.txt; done;

By: Asun Friere

Asun Friere — Mon, 07 Sep 2009 04:53:11 +0000

Is there any options so that Other than first letter of a word get converted to lowercase You mean preserve the first and translate the rest? How about: echo $(echo $VAR_NAME | cut -c1)$(echo $VAR_NAME | cut -c2- | tr [A-Z] [a-z])

By: vinutha

vinutha — Sat, 05 Sep 2009 04:46:13 +0000

show the correct program fully

By: sanjay Katiyar

sanjay Katiyar — Fri, 07 Aug 2009 07:40:35 +0000

Is there any options so that Other than first letter of a word get converted to lowercase

By: Raja Baz

Raja Baz — Tue, 28 Jul 2009 10:48:56 +0000

Damn I didn’t notice this thing had html tags enabled and used angled brackets in my post. I meant:

tr [all uppercase cyrillic characters] [their lowercase equivalent]
instead of just ‘tr’

By: Raja Baz

Raja Baz — Tue, 28 Jul 2009 10:47:35 +0000

Well, tr has no way of knowing what are uppercase and what are lowercase cyrillic characters. You need to provide it with this information.

The example above is equivalent to:

tr [ABCDEFGHIJKLMNOPQRSTUVWXYZ] [abcdefghijklmnopqrstuvwxyz]

By: Lucas Vieites

Lucas Vieites — Wed, 18 Feb 2009 11:28:05 +0000

This work fine when using latin characters, but not when using Unicode characters. For example a string with Cyrillic characters (“Английский”) doesn’t get converted. Any tips on how to do that?