Docker Hub is a public/private registry for Docker container images, used to distribute and download images.
What it’s used for
- Pulling images (e.g.,
ubuntu,nginx). - Publishing your own images (push).
- Managing repositories and tags.
Common issues
- Rate limiting (429 / Too Many Requests): pull limits (especially when not logged in).
- Login failures: credentials, MFA, expired token.
- Pull failures: network/DNS, corporate blocking, missing image/tag.
Status
- Check official status at dockerstatus.com.