Docker - For Beginner Part 3

Installation Of Docker On Ubuntu :

1. Remove old installation if it is installed

    sudo apt-get remove docker docker-engine docker.io containerd runc
   

2. Update the Ubuntu packages & install the packages

     sudo apt-get update
     sudo apt-get install ca-certificates curl gnupg
   

3. Install Docker official GPG key

     sudo install -m 0755 -d /etc/apt/keyrings
     curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
     sudo chmod a+r /etc/apt/keyrings/docker.gpg
   

4. Command to set up the repository:

    echo \
      "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
      "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
      sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
   

5. Install the latest Docker package

     sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
   

6. Verify the docker installation

     sudo docker --version
   

Basic Commands :

1. Check version

    docker --version
   

2. To check all downloaded / present docker images

    docker images
   

3. Docker Login

    docker login
   

4. To find the images in the docker hub

    #docker search <nameofimage>
    docker search jenkins
   

5. Download any image

    #docker pull <nameofimage>
    docker pull jenkins
   

6. To check the service

    service docker status
   

7. Start Container

    #docker start <containername/containerid>
    docker start mynginx
   

8. Stop Container

    #docker stop <containername/containerid>
    docker stop mynginx
   

9. Kill Container

    #docker kill <containername/containerid>
    docker kill mynginx
   

10. To see all running container

    docker ps
    

11. To see all running and stopped container

    docker ps -a
    

12. Remove the docker image

    #docker rmi <imagename>
    docker rmi jenkins
    

13. Remove the container

    #docker rm <containername/containerid>
    docker rm jenkins
    

14. Prune the container

    docker system prune
    

15. Create the image from the docker file

    #docker build -t <tagname> <absoulte_path>
    docker build -t LatestNginx /home/docker/Dockerfile
    OR
    docker build -t LatestNginx .
    

16. Create a container

    #docker run -it --name <nameofcontainer <imagename> /bin/bash
    docker run -it --name LatestUbuntu Ubuntu /bin/bash
    

17. Connect to the container

    #docker attach <containername/containerid>
    docker attach LatestUbuntu
    

18. Check the logs of a container

    docker container logs <containername/containerid>
    docker logs abebb534sff3