Extracting total size of AWS S3 bucket space

AWS CLI command combinations

# Use the AWS CLI S3 tools to calculate the amount of space used in a bucket from a listing of the bucket contents
# The first awk extracts the 3rd column, which is the size of the key contents in KB
# The second awk sums the values and outputs the total multiplied by 1024 for total number of bytes

aws s3 ls s3://w205-project-twitter-streams/isis | awk '{ print $3 }' | awk '{s+=$1} END {print s*1024}'

# This command uses the AWS CLI S3 ls command to count the number of keys in a bucket

aws s3 ls s3://w205-project-twitter-streams/isis | tee >(wc -l)
# or this
aws s3 ls s3://w205-project-twitter-streams/isis | awk '{ print } END { print NR }'