Write down the command you will use to copy all files from one S3 bucket to another with s3cmd?
s3cmd sync s3://from/this/bucket/ s3://to/this/bucket/

http://www.interviewquestionspdf.com/2016/11/write-down-command-you-will-use-to-copy.html
s3cmd sync s3://from/this/bucket/ s3://to/this/bucket/