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Amazon S3 Tools: Command Line S3 Client and S3 Backup for Windows, Linux: s3cmd, s3express

S3Cmd, S3Express: Fully-Featured S3 Command Line Tools and S3 Backup Software for Windows, Linux and Mac. More than 60 command line options, including multipart uploads, encryption, incremental backup, s3 sync, ACL and Metadata management, S3 bucket size, bucket policies, and more. List and query S3 objects using conditional filters, manage metadata and ACLs, upload and download files.