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Re:AWS Shell – An integrated shell for working with the AWS CLI by vbsteven on Tuesday December 29, 2015 @01:37AM (#10805572)
You can do that through the regular AWS cli tools with "aws s3 cp..." or with external tools like s3cmd which is a third party s3 cli client.
Re:AWS Shell – An integrated shell for working with the AWS CLI by dv_says on Tuesday December 29, 2015 @03:16AM (#10805763)
In fact, this even can even sync new/modified/deleted files, similar to rsync. Very handy for deploying static assets or backups, for example.

   aws s3 sync --delete [--acl public-read] ...