shaoyanji

#!/usr/bin/env bash
find . -depth -name '* *' | while read fname; do
    new_fname=$(echo $fname | tr " " "_")

    if [ -e $new_fname ]; then
        echo "File $new_fname already exists. Not replacing $fname"
    else
        echo "Creating new file $new_fname to replace $fname"
        mv "$fname" $new_fname
    fi