Get Size details of all S3 buckets

prepare_s3_report-basic.sh

#!/bin/bash

# exit when the command fails
set -o errexit;
# exit when try to use undeclared var
set -o nounset;
Total_num_of_buckets=`aws s3 ls s3:// | awk '{print $NF}'| wc -l`
printf "%s: %4d\n" "Total Number of s3 buckets" ${Total_num_of_buckets} 
printf "%s: %4s\n" "Bucket Name" "Bucket Size"

for bucket in `aws s3 ls s3:// | awk '{print $NF}'`; do printf "$bucket :"; aws s3 ls s3://$bucket --recursive --human-readable --summarize | tail -1 | tr -d 'Total Size:'; done