#!/bin/bash
file="something"
find . -name '*\ *' -print | tac |
while read line 
do
    echo
    echo "$line" 
    file=`echo "$line" | sed s_^.*/__ | sed s_\ __g`
    file1=`echo "$line" | sed 's_[^/]*$__'`$file
    echo "$file1"
    mv "$line" "$file1"
    echo 

done