AWS CLI

List all the AWS S3 Buckets
​aws s3api list-buckets --query "Buckets[].Name"

See if you can get a response from an AWS endpoint
​ curl <ip:port> -s | xmllint --format -

Access Public S3 Bucket:
​ aws --endpoint <url:port> --no-sign-request s3 ls s3://public

you can use 'cp' command to copy the data to your local machine.