gistfile1.sh

#!/bin/bash
 human_filesize() {     
  local fsize=$1     
  echo "fsize = $fsize"
  declare -a units=(' B', ' KB', ' MB', ' GB', ' TB')
  for (( i=0; $fsize > 1024; i++ ))
  do
     local fsize=$(echo "scale=2;$fsize/1024" | bc )
     echo "now fsize = $fsize" 
  done

  echo printf "%0.2f\n" "$fsize"
}
##############
# MAIN
##############
bytes=$(/usr/bin/s3cmd --config="/home/ec2-user/.s3cfg" du s3://antidote-dam  | awk '{print $1}')
echo "bytes is: $bytes"
echo $(human_filesize $bytes)