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Change file name from upper to lower case (See related posts)

This script requires perl, and a modern shell with ls (this was written/tested using Bash). It also will not work recursively without some modifications.

for file in `ls -1|perl -ne 'print "$_" if (/[A-Z]/);'`
do
  mv ${file} `echo ${file}|perl -ne 'chomp;print "$_" if (tr/A-Z/a-z/);'`;
done
to files perl oneliner shell by sjspig on Sun Sep 04 01:42:05 -0400 2005

Comments on this post

jim posts on Feb 04, 2006 at 00:31
If you have perl intalled, you probably have rename installed:

rename 'y/A-Z/a-z/' *

camcorder posts on Mar 23, 2006 at 09:45
Another one liner without using perl might be:
for i in *; do mv $i `echo $i | tr [:upper:] [:lower:]`; done

if you have lower case files this script will put a warning for them stating target file is same, but it's just a warning, that would change all files to lowercase.

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