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
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:
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:
Once you have started using Docker, will have many active and inactive containers.
Run the following command on terminal to view all active containers:
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.
In this tutorial, i have shown to you how to install, configure and use manage Docker on Ubuntu 22.04.