Bulk recursive rename dirs and files

bulkRename.sh

#!/bin/bash 
# $1 is the var
# $2 is replace from
# $3 is replace to

EXPECTED_ARGS=3
E_BADARGS=65
HELP=$(cat <<EOF
Usage with three arguments:
  `basename $0` /var/www/path/ typo type

EOF
)

if [ $# -ne $EXPECTED_ARGS ]
then
  echo $HELP
  exit $E_BADARGS
fi

echo "Renaming Directory"
find $1 -type d -name "*$2*" | while read DIR
do
newname=`echo $DIR | sed s/$2/$3/`
echo $newname
mv "$DIR" "$newname"
done

echo "Renaming Files"

find $1 -type f -name "*$2*" | while read FILE
do
newname=`echo $FILE | sed s/$2/$3/`
echo $newname
mv "$FILE" "$newname"
done