Pad filenames with zeros in bash

rename.sh

#!/bin/bash

maxLength=8

for file in `find *`
    do
    if [ ${#file} -lt $maxLength ]
    then
      newFile=$file
      while [ ${#newFile} -lt $maxLength ]
      do
        newFile=0${newFile}
      done
    mv $file $newFile
  fi
done