s3cmd

s3cmd is a long-running community CLI for Amazon S3 and other S3-compatible object stores. It covers file transfer, bucket inspection, and bucket-level configuration from the shell.

• Create buckets, list objects, upload or fetch files, restore Glacier objects, and sync local trees to or from S3-compatible storage.
• Apply ACLs, versioning, ownership, public-access blocks, tags, policies, CORS, lifecycle rules, and notification configs without using a web console.
• Manage static website settings, signed URLs, multipart uploads, and basic CloudFront distribution or invalidation tasks from scripts.

• Commands are non-interactive after credentials and endpoint settings are in place, with dry-run, retry, and partial-failure exit codes that work in scripted transfer loops.
• The weak point is output shape: most commands print plain text, and some reads return prettified XML, so follow-up parsing is more brittle than JSON-first CLIs.
• Best fit is backup, sync, and bucket-admin workflows where a skill can hide config details and wrap the text-oriented output.

• Initial setup commonly goes through --configure, which is interactive unless you manage ~/.s3cfg, environment variables, or flags yourself.
• This is a community project rather than an official AWS CLI, and some features reflect older S3 or CloudFront workflows.