📋 Docker Cheat Sheet

Image Operations

Operation	Command
Pull an image	docker pull nginx:alpine
List local images	docker images
Build an image	docker build -t myapp:1.0 .
Remove an image	docker rmi myapp:1.0
View image layers	docker history myapp:1.0
Export an image	docker save myapp:1.0 | gzip > myapp.tar.gz
Import an image	docker load < myapp.tar.gz

Container Operations

Operation	Command
Run in background	docker run -d --name web nginx
Port mapping	docker run -d -p 8080:80 nginx
Enter a container	docker exec -it web /bin/bash
View logs	docker logs -f web
List running containers	docker ps
List all containers	docker ps -a
Stop a container	docker stop web
Restart a container	docker restart web
Remove a container	docker rm web
Inspect container details	docker inspect web
Resource monitoring	docker stats
Copy files	docker cp web:/app/log.txt ./

Compose Operations

Operation	Command
Start all services	docker compose up -d
Stop and remove	docker compose down
View status	docker compose ps
View logs	docker compose logs -f
Rebuild	docker compose up -d --build
Enter a service container	docker compose exec web bash
Restart a specific service	docker compose restart web

Cleanup Operations

Operation	Command	Notes
Remove stopped containers	docker container prune	Safe
Remove unused images	docker image prune -a	Safe
Remove unused networks	docker network prune	Safe
One-click cleanup	docker system prune -a	⚠️ Removes all unused resources
Remove volumes	docker volume prune	⚠️ May cause data loss