Update: Amazon has now made it so you can set expiration times on objects in S3, see more here: https://forums.aws.amazon.com/ann.jspa?annID=1303 Recently I was working on a project where we upload backups to Amazon S3. I wanted to keep the files around for a certain duration and remove any files that were older than a month. We use the s3cmd utility for most of our command line based calls to S