Rename files and folders to lowercase recursively

convert_to_lower-case.sh

#!/bin/bash
# Rename all directories. This will need to be done first.
# Process each directory’s contents before the directory itself
find * -depth -type d | while read x
do
        # Translate Caps to Small letters
        y=$(echo "$x" | tr '[A-Z ]' '[a-z_]');

        # create directory if it does not exit
        if [ ! -d "$y" ]; then
                mkdir -p "$y";
        fi

        # check if the source and destination is the same
        if [ "$x" != "$y" ]; then

                # move directory files before deleting
                ls -A "$x" | while read i
                do
                  mv "$x"/"$i" "$y";
                done
                rmdir "$x";

        fi

done

# Rename all files
find * -type f | while read x ;
do
        # Translate Caps to Small letters
        y=$(echo "$x" | tr '[A-Z ]' '[a-z_]');
        if [ "$x" != "$y" ]; then
                mv "$x" "$y";
        fi
done

exit 0

I use your code for rename all my directories and files into my macbook, according to my code the right way to appoint variable Y is y=echo "$x" | tr '[a-z]' '[A-Z]' this works for a bash shell in a macbook. Thanks.

Or, if you're a mad man and just wanna lowercase all files (not folders) in the current dir & sub dirs:

lower case all files in current dir & subdirs

for d in ./**/ ; do (cd "$d" && for x in ./*/ ; do (cd "$x" && for f in *; do mv "$f" "$f.tmp"; mv "$f.tmp" "echo $f | tr "[:upper:]" "[:lower:]""; done); done); done

Try this one out much simple and easy one!

for f in **/*; do mv "$f" "${f:l}"; done