Get bucket size and object count by first level prefix (i.e. bucket/prefix1, bucket/prefix2)

s3DuByPrefix.sh

#!/bin/sh
BUCKETNAME=mybucketname; REGION=us-east-1; for prefix in $(aws s3api list-objects --bucket $BUCKETNAME --delimiter '/' --output text --region $REGION |grep COMMONPREFIX |tail -n+2| awk '{print $2}'); do echo "Totals for $prefix"; aws s3 ls --summarize --human-readable --recursive s3://$BUCKETNAME/$prefix --region $REGION ; done |grep Total