Docker Tutorial — Docker Hub Overview
Docker Hub is the default public registry for container images. It’s where docker pull goes by default, and where millions of pre-built images live.
Image Categories
| Category | Badge | Examples |
|---|---|---|
| Official Images | Docker-maintained | nginx, postgres, python, node |
| Verified Publisher | Company-verified | bitnami/redis, grafana/grafana |
| Community | User-submitted | Anyone can publish |
Rate Limits
| Account Type | Pull Limit |
|---|---|
| Anonymous | 100 pulls per 6 hours per IP |
| Free authenticated | 200 pulls per 6 hours |
| Pro/Team | 5,000 pulls per day |
# Log in to increase your rate limit
$ docker login
Username: yourusername
Password: ********
Login Succeeded
Quick Reference
Docker Hub: hub.docker.com
Default registry: docker.io/library/<image>
Login: docker login
Rate limits: 100 (anon) / 200 (free) / 5000 (pro) per period
Official images: docker.io/library/nginx = docker pull nginx
