Day 37 – Docker Revision & Cheat Sheet Instead of learning something new, I focused on: Revising core concepts (images, containers, networking, volumes) Answering quick-fire questions from memory Building a practical Docker cheat sheet (real commands I’ll actually use) Identifying weak areas and revisiting them Checkout my work: https://lnkd.in/g-7SKf2m Check comments for cheat sheet #90DaysOfDevOps #DevOpsKaJosh #TrainWithShubham #Docker #DevOps #CloudComputing #BackendDevelopment #SoftwareEngineering #LearningInPublic #TechJourney #DeveloperLife #CareerGrowth #BuildInPublic
Umesh B
1w
## Compose Commands docker compose up # Start services docker compose up -d # Detached mode docker compose down # Stop services docker compose ps # List services docker compose logs # View logs docker compose build # Build services ## Cleanup Commands docker system prune # Remove unused data docker system prune -a # Remove all unused images docker volume prune # Remove unused volumes docker network prune # Remove unused networks docker system df # Show disk usage # Remove EVERYTHING unused (containers, images, volumes, networks) docker system prune -a --volumes # Remove only stopped containers docker container prune # Remove all unused images docker image prune -a ## Dockerfile Instructions FROM node:18 # Base image WORKDIR /app # Working directory COPY . . # Copy files RUN npm install # Install dependencies EXPOSE 3000 # Expose port CMD ["npm", "start"] # Default command ENTRYPOINT ["node"] # Fixed command
## Container Commands docker run -it nginx /bin/bash # Run container (interactive) docker run -d nginx # Run container (detached) docker ps # List running containers docker ps -a # List all containers docker stop <id> # Stop container docker rm <id> # Remove container docker exec -it <id> /bin/bash # Access running container docker logs <id> # View logs ## Image Commands docker build -t myapp:latest . # Build image docker pull nginx # Pull image docker push username/myapp # Push image docker tag myapp username/myapp # Tag image docker images # List images docker rmi <id> # Remove image ## Volume Commands docker volume create myvolume # Create volume docker volume ls # List volumes docker volume inspect myvolume # Inspect volume docker volume rm myvolume # Remove volume ## Network Commands docker network create mynet # Create network docker network ls # List networks docker network inspect mynet # Inspect network docker network connect mynet <container>