How to Install Docker on Ubuntu 22.04

In this tutorial, i am going to show you how to install, configure and use docker on ubuntu 22.04 machine.

How to Install Docker on Ubuntu 22.04

Follow the below given steps to install, configure and use docker on ubuntu 22.04 machine:

  • Step 1 – Update System Dependencies
  • Step 2 – Install Docker
  • Step 3 – Configure Sudo permissions for Docker
  • Step 4 – Using Docker Commands
    • Download Docker Images
    • Docker Commands

Step 1 – Update System Dependencies

Run the following command on terminal to update the packages to the latest version available:

sudo apt update
sudo apt upgrade

Step 2 – Install Docker

Run the following command on terminal to install some packages which allows you to use the packages over HTTPS.

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

Add the GPG key of Docker repository.

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

Then add the Docker repository of Ubuntu 22.04 (jammy) to the apt sources.

echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Update the packages index and setup your server to install Docker from official Docker repo.

sudo apt update
sudo apt-cache policy docker-ce

Then you will receive an output similar to this: as is follow:

Output
docker-ce:
  Installed: (none)
  Candidate: 5:20.10.14~3-0~ubuntu-jammy
  Version table:
     5:20.10.14~3-0~ubuntu-jammy 500
        500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
     5:20.10.13~3-0~ubuntu-jammy 500
        500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages

Run the following command on terminal to install Docker on ubuntu 22.04 system:

sudo apt install docker-ce

Once Docker is installed and the process is enabled to start on boot.

To check the status of Docker you can use the following command.

sudo systemctl status docker

The output will be like this.

Output
● docker.service - Docker Application Container Engine
     Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
     Active: active (running) since Wed 2022-05-04 06:43:00 UTC; 2min 28s ago
TriggeredBy: ● docker.socket
       Docs: https://docs.docker.com
   Main PID: 12995 (dockerd)
      Tasks: 8
     Memory: 38.6M
        CPU: 400ms
     CGroup: /system.slice/docker.service
             └─12995 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

Step 3 – Configure Sudo permissions for Docker

If you want to run the docker command without sudo, Then run the following command with username on terminal to the docker group:

sudo usermod -aG docker username

And restart SSH or open a new terminal to see the changes.

From now you use the docker command without sudo.

Step 4 – Using Docker Commands

Run the following command to view the system information about Docker; is as follows:

docker info

Download Docker Images

docker run hello-world

If the output you get is similar to the below then you can access and download images from Docker Hub.

Output
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
2db29710123e: Pull complete 
Digest: sha256:10d7d58d5ebd2a652f4d93fdd86da8f265f5318c6a73cc5b6a9798ff6d2b2e67
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

Run the following command to see downloaded images:

docker images

Docker Commands

Once you have started using Docker, will have many active and inactive containers.

Run the following command on terminal to view all active containers:

docker ps

Run the following command on terminal to view all containers which are active and inactive:

docker ps -a

Run the following command on terminal to view the latest container:

docker ps -l

To start a docker container, use docker start command followed by the Container ID or Container Name:

docker start container-id/name

Likewise to stop a running container you can use the docker stop command followed by Container ID or Container Name:

docker stop container-id/name

If you no longer need the container you can remove the container with the docker rm followed by Container ID or Container Name:

docker rm container-id/name

To enter into interactive shell we can use the following command:

docker run -it container-id/name

Note that:- you can manually install commands inside the shell. For more details about docker commands use the docker run help command.

Conclusion

In this tutorial, i have shown to you how to install, configure and use manage Docker on Ubuntu 22.04.

More Tutorials

Be First to Comment

Leave a Reply

Your email address will not be published. Required fields are marked *