#!/bin/bash
if [ -z $1 ];then
echo "Uso :$(basename $0) parent-directory"
exit 1
fi
 
all="$(find $1 -depth)"
 
for name in ${all}; do
new_name="$(dirname "${name}")/$(basename "${name}" | tr '[A-Z]' '[a-z]')"
if [ "${name}" != "${new_name}" ]; then
[ ! -e "${new_name}" ] && mv -T "${name}" "${new_name}"; echo "${name} was renamed to ${new_name}" || echo "${name} wasn't renamed!"
fi
 
done
exit 0