Docker CLI Cheat Sheet

docker run -d --name web -p 8080:80 nginx   # run in background
docker ps                                   # running containers
docker ps -a                                # all, with exit codes
docker logs -f --tail 100 web               # follow logs
docker exec -it web sh                      # shell inside
docker stop web && docker rm web            # stop and remove
docker restart web

docker images                     # list images
docker pull nginx:1.27            # download an image
docker build -t myapp:1.0 .       # build from Dockerfile
docker buildx build --platform linux/amd64 -t myapp:1.0 .
docker tag myapp:1.0 user/myapp   # tag for a registry
docker push user/myapp            # upload
docker rmi myapp:1.0              # remove image

docker volume ls                  # list volumes
docker volume create data         # create a volume
docker run -v data:/var/lib/data app
docker network ls                 # list networks
docker network create backend     # create a network
docker run --network backend app
docker network inspect backend    # who is connected

docker compose up -d              # start the stack
docker compose ps                 # stack status
docker compose logs -f api        # follow one service
docker compose up -d --build api  # rebuild one service
docker compose exec api sh        # shell in a service
docker compose config             # final config, with .env
docker compose down               # stop and remove
docker compose down -v            # ...and its volumes (data!)

docker inspect -f '{{.State.ExitCode}} OOMKilled={{.State.OOMKilled}}' web
docker logs --tail 50 web         # last output before exit
docker events --since 1h --filter container=web
docker inspect -f '{{.RestartCount}}' web

docker inspect web                # full JSON details
docker stats --no-stream          # CPU / memory vs. limit
docker top web                    # processes in container
docker port web                   # published ports
docker cp web:/etc/nginx/nginx.conf .
docker run --rm -it --entrypoint sh myapp:1.0   # skip the app

docker system df                  # what uses disk space
docker container prune            # stopped containers
docker image prune -a             # unused images
docker builder prune              # build cache
docker system prune               # stopped containers, unused networks,
                                  # dangling images, build cache