Installing Docker on Ubuntu 22.04 LTS

Requirements

• A running instance of Ubuntu 22.04 LTS.
• A user account with sudo privileges.

Steps to Install Docker

1. Update Your System:
   • Open a terminal and update the package index:

     sudo apt update
     sudo apt upgrade -y
     

2. Install Required Packages:
   • Install packages to allow apt to use a repository over HTTPS:

     sudo apt install apt-transport-https ca-certificates curl software-properties-common -y
     

3. Add Docker’s Official GPG Key:
   • Add the GPG key for the Docker repository:

     curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
     

4. Add the Docker Repository:
   • Add the Docker repository to APT sources:

     sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
     

5. Update the Package Index Again:
   • Refresh the package index to include the new Docker repository:

     sudo apt update
     

6. Install Docker:
   • Install the latest version of Docker CE (Community Edition):

     sudo apt install docker-ce -y
     

7. Start and Enable Docker:
   • Start the Docker service and enable it to run on startup:

     sudo systemctl start docker
     sudo systemctl enable docker
     

8. Verify Docker Installation:
   • Check if Docker is installed correctly by running:

     sudo docker --version
     

   • You can also run the hello-world image to test Docker:

     sudo docker run hello-world
     

9. Manage Docker as a Non-root User (Optional):
   • To run Docker commands without sudo, add your user to the Docker group:

     sudo usermod -aG docker $USER
     

   • Log out and back in for the changes to take effect.
10. Check Docker Status:
    • Verify that Docker is running:

      sudo systemctl status docker
      

Conclusion

You have successfully installed Docker on Ubuntu 22.04 LTS. You can now start using Docker to manage containers and images.