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One liner to lowercase any uppercase file names
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a23d56
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PostPosted: Wed Jan 28, 2004 7:51 pm    Post subject: One liner to lowercase any uppercase file names Reply with quote

Code:
find ./ -type f -name \*[[:upper:]]\* | sed -e 's#\(.*/\)\(.*\)$#\"\1\2\" \"\1\L\2\E\"#' | xargs -n 2 -r mv -i -v 2>/dev/null


:idea:

To be safe, first try it without the pipe to xargs, to see what it finds.

If that looks OK, then run it with the pipe to xargs. It will report every name changed.

Then once more, remove the pipe to xargs, run it again, and it will report any files that could not be renamed because there was already a file having the same lowercase name.


Last edited by a23d56 on Sun Feb 01, 2004 3:45 am; edited 3 times in total
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meowsqueak
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PostPosted: Wed Jan 28, 2004 8:40 pm    Post subject: Reply with quote

Nice one-liner. Can I suggest adding '-i' to the mv command, to ensure you never accidentally overwrite an existing file?
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a23d56
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PostPosted: Wed Jan 28, 2004 8:59 pm    Post subject: Reply with quote

meowsqueak wrote:
Nice one-liner. Can I suggest adding '-i' to the mv command, to ensure you never accidentally overwrite an existing file?


Good idea.
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snakattak3
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PostPosted: Wed Jan 28, 2004 11:28 pm    Post subject: Reply with quote

You can use this
Code:
for i in *.*; do mv "$i" `echo $i | tr ' ' '_'`; done
to remove spaces from a filename first. Then use a23d56's line or this one
Code:
for i in *.*; do mv "$i" `echo $i | tr '[A-Z]' '[a-z]'`; done
. I love how there are 50 different ways to do something in linux :) Mine only works on filenames in the current directory, and not on directory names, only file names.
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jesterspet
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PostPosted: Thu Jan 29, 2004 2:50 am    Post subject: Reply with quote

These may not be one liners (just like in the previous example can be converted into one line), but they serve a similar purpose:

Unix Tip 2047 - August 9, 2003

To convert the file names from upper case to lower in all subdirectories a simple script can be used:
Code:
for i in $*
do
  mv $i `echo $i | tr A-Z a-z`
done


Unix Tip 2038 - July 31, 2003

This script can be used to convert the file names from upper case to lower case and vice versa.
Code:
typeset -u Lcase
for Ucase in `ls`
do
Lcase=$Ucase
mv  $Ucase $Lcase
done

And to convert from lower case to upper case, just change (typeset -u ) to be ( typeset -l ).


Unix Tip 1986 - June 9, 2003

If you have occasion where you need to translate upper case to lower and vice versa, and happen to run a ksh, enter the following functions into your .profile:
Code:
function trans
{
tr '[:upper:]' '[:lower:]' <$1  > $2
}
function TRANS
{
tr '[:lower:]' '[:upper:]' <$1 > $2
}

The first function will translate all uppercase letters in the first file (argument) to lowercase in the second file.

The second function TRANS does the exact opposite.


Unix Tip 1956 - May 10, 2003

A shorter method for renaming all files in a unix directory from upper to lower case.
Code:
for file in *
do
  mv $file `echo $file | tr [:upper:] [:lower:]`  2>/dev/null
done


Armed with these tid bits & the previous posting, readers should not have many more troubles with upper & lower case files/directories/text. :D
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Last edited by jesterspet on Thu Jan 29, 2004 2:56 am; edited 1 time in total
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a23d56
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PostPosted: Thu Jan 29, 2004 2:54 am    Post subject: Reply with quote

snakattak3 wrote:
You can use this
Code:
for i in *.*; do mv "$i" `echo $i | tr ' ' '_'`; done
to remove spaces from a filename first


FWIW, my find/sed solution copes with spaces embedded in a filename, and leaves them intact.

Using find also lets you customize the search to suit your needs, with all the power of find.

My first version did not work with subdirectories where a directory name had uppercase characters, because it inadvertently tried to lower case the directory name, not just the file name, and that caused the mv command to fail. But that's fixed now, in the current revision above.
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soroh6
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PostPosted: Tue May 11, 2004 8:06 am    Post subject: Reply with quote

Code:
emerge mmv
mmv \* \#l1 (I have this aliased to 'lc')


Yes, I know this thread is getting old.

-edit- Oh, yes.. Forgot, lowercase to uppercase.
Code:
mmv \* \#u1

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monsieur
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PostPosted: Sat May 13, 2006 5:31 pm    Post subject: Reply with quote

hello,
yes i know the topic is old, but none of the solutions posted can deal with *all* filenames.
The correct solution is to use find's -print0 option along with either xargs -0 or read -d $'\0' . This way, you can also deal with newlines in the filenames.
Also, use mv -- to deal with filenames beginning with -.
Here it is all explained : http://wooledge.org/mywiki/BashFaq#faq20
Also, USE MORE QUOTES!!! http://www.grymoire.com/Unix/Quote.html
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