Change filenames to lowercase in Ubuntu in all subdirectories [closed]

Answer 1

Perl has a locale-aware lc() function which might work better:

find . -type f | perl -n -e 'chomp; system("mv", $_, lc($_))'

Note that this script handles whitespace in filenames, but not newlines. And there's no protection against collisions, if you have "ASDF.txt" and "asdf.txt" one is going to get clobbered.

Answer 2

Here's one way using find and tr:

for i in $(find . -type f -name "*[A-Z]*"); do mv "$i" "$(echo $i | tr A-Z a-z)"; done

Edit; added: -name "*[A-Z]*"

This ensures that only files with capital letters are found. For example, if files with only lowercase letters are found and moved to the same file, mv will display the are the same file error.