Introduction to Docker

Published: Draft

Written By: Ng Jun Hao

Commands

• Docker commands
  • sudo systemctl enable --now docker - Start on boot
  • sudo systemctl status docker - Check Docker service
  • sudo usermod -aG docker $USER - Add current user to Docker group
  • docker ps - Check installation
  • sudo docker container run hello-world - Pull and run hello-world image from Docker Hub
  • sudo docker container ls - List containers
  • sudo docker container run -it ubuntu /bin/bash - Enter the ubuntu container with interactive shell
  • sudo docker container run -dit ubuntu /bin/bash - Start ubuntu container in background
  • sudo docker container attach c59dd04833466e - Interact with background container
  • sudo docker container run -dit --name webserver -p 8080:80 ngnix - Start a ngnix server and expose port
  • sudo docker container cp index.html webserver:/usr/share/ngnix/html/index.html - Copy into container
  • sudo docker contianer stop webserver - Stop container
  • sudo docker container prune - Remove stopped containers
  • sudo docker image ls - List images
  • sudo docker image pull alpine - Get image from registry
  • sudo docker image pull gcr.io/google-samples/hello-app:2.0 - Pull image from other places
  • sudo docker image build -t ngnix:version1 - Build an image
  • sudo docker container run -dit --name webapp -p8081:80 nginx:version1 - Create container

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