If you’re using Ubuntu on your system and want to install Docker on Ubuntu, then this guide is for you. With this guide, you’ll get detailed instructions to install docker on Ubuntu without any hassle.
Docker is a tool used to automate the setting up of programs in lightweight containers. This allows applications to function well in a variety of contexts. Docker has become a cornerstone of modern software development and deployment, enabling efficient containerization and simplified application management. If you’re using Ubuntu and want to experience the power of Docker, you’re in the right place. In this step-by-step guide, we’ll go through the process to install Docker on Ubuntu in your system. We’re also going to provide you with information on what docker is and how it works.
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Table of Contents
What is Docker?
Docker is an app that makes managing tasks running in containers easier. Containers allow you to run apps in resource-isolated processes that are separate from one another. Containers are like virtual machines, but they are easier to move around, use fewer resources, and rely more on the operating system that hosts them.
Docker is a program that makes the process of controlling application processes within containers simpler and easier to understand. Containers allow you to run apps in resource-isolated processes that are separate from one another. Containers are portable, resource-friendly, and more dependent on the operating system of the host computer than virtual machines are. Containers are comparable to virtual machines.
Install Docker on Ubuntu from the Official Repository
Install Docker from the official Docker repository to ensure you get the latest stable program version. You need to add the new package source to Ubuntu then install Docker on Ubuntu to get to the official Docker store. Follow the steps below:
Step 1: Update Package Repositories
Start by updating your package repositories to ensure you’re working with the latest package information. Open a terminal and run:
sudo apt update
Step 2: Install Dependencies
Docker requires a few packages to enable secure communication with the Docker repository over HTTPS. Install these packages with the following command:
sudo apt install -y apt-transport-https ca-certificates curl software-properties-common
Step 3: Add Docker GPG Key
To verify the authenticity of Docker packages, you’ll need to add Docker’s official GPG key. You can import the key by running the following command:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg--dearmor -0 /usr/share/keyrings/docker-archive-keyring-gpg
Step 4: Add Docker Repository
Now, add Docker’s repository to your system. This repository provides Docker packages for Ubuntu. Use the following command:
echo "deb [signed-by=/us/share/keyrings/docker-archive-keyring.gpg]
https://download.docker.com/linux/ubuntu $(1sb_release -cs) stable" | sudo tee
/etc/apt/sources.list.d/docker.list > /dev/nul1
Step 5: Install Docker on Ubuntu
It is highly advised that the already installed program’s package list be brought up to date before proceeding with the installation of any new software. Get the most recent installation package requirements, regardless of whether you are working locally or remotely.
sudo apt update
The Docker Community Edition installation process may now begin. It includes the Docker platform with all of its fundamental capabilities, but it does not have any enterprise functionality or commercial support, both of which are typically unnecessary for small and medium-sized organizations.
sudo apt install docker-ce
Following the completion of the installation, the Docker service should be operational. You may verify this by using the systemctl status command, which checks to see if a certain systemd process is currently running. If you are unsure about anything, you can use this command.
sudo systemctl status docker
If you were able to install Docker on Ubuntu without any problems, the result would be the same and include details regarding Docker being functional.
docker@3st:-$ sudo systemctl status docker
sudo: unable to resolve host t3st: Name or service not known
docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor presets
Active: active (running) since Thu 2021-09-30 10:49:34 EEST; 1min 7s ago
TriggeredBy: • docker.socket
Docs: https://docs.docker.com
Main PID: 14503 (dockerd)
Tasks: 13
Memory: 32.9M
Group: /system.slice/docker.service
-14503 /us/bin/dockerd -H fd:// --containerd=/run/containerd/con≥
Step 6: Start and Enable Docker
Start the Docker service and ensure it starts automatically on boot:
sudo systemctl start docker
sudo systemctl enable docker
Step 7: Verify Installation
To confirm that Docker is installed and running, execute the following command:
sudo docker --version
You should see the Docker version printed in the terminal, indicating that Docker is installed and operational.
Step 8: (Optional) Add Your User to the Docker Group
By default, Docker commands require sudo privileges. If you’d like to use Docker without sudo, add your user to the docker group:
sudo usermod -aG docker $USER
Remember to log out and log back in for the group changes to take effect.
How to Use Docker on Ubuntu
All the details about Docker, including the commands, options, and how to use it, can be found by running the “docker” command in the terminal.
$ docker
Begin your Docker journey by downloading Docker images, crafting containers, and overseeing Docker volumes.
Also check: Our blog post on docker network
Adding Docker Compose To Your Ubuntu Installation
Docker Compose is a popular companion tool for the Docker software that simplifies the process of working with applications that make use of numerous containers. Docker compose has the ability to start and stop several containers simultaneously, in contrast to the docker CLI, which only targets a single container with each command. Managing systems with distinct frontend, backend, and database services is made easier as a result of this development.
Docker Compose is now accessible through docker (CLI). When you utilize the official installation code to set up Docker, the Compose V2 plugin is already installed and ready to use. It is also accessible in apt, in case you choose to do things that way:
$ sudo apt install docker-compose-plugin
You also have the option to manually install docker on Ubuntu it by downloading the latest .deb.deb archive and doing the installation:
$ curl https://download.docker.com/linux/ubuntu/dists/$(1sb_release --codename | cut -f2)/pool/stable/$(dpkg --print-architecture)/docker-compose-plugin_2.6.0~ubuntu-focal_amd64.deb -o docker-compose-plugin.deb $ sudo apt install -i ./docker-compose-plugin.deb
Try using the docker compose version command to ensure that Compose is functioning correctly:
$ docker compose version Docker Compose version v2.6.0
Conclusion
Most developers will learn about containers through Docker. Whether using Docker Engine or the brand-new Docker Desktop, you can easily install Docker on Ubuntu. You can simplify development and decrease the gap between environments by using containers, which you can create and run after installing Docker.
You’ve successfully completed the process to install docker on Ubuntu. You now have access to this highly effective containerization solution, which is prepared to simplify the processes involved in the development and deployment of your applications. Docker’s adaptability will prove to be a very significant item in your toolset, whether you use it for the construction of apps or the management of services. Begin the process of building and maintaining containers with self-assurance and comfort.
If you have more queries about docker installation and maintenance, then contact us. Our dedicated team members will solve your queries and provide you with informative solutions for each of your issues.
FAQs
Q1. How do I know if Docker is installed on Ubuntu?
You can find out if Docker is installed on your Ubuntu system by opening a terminal and typing: docker –version. If it’s installed, you’ll see the Docker version.
Q2. Why should I use Docker on Ubuntu?
Docker makes it easier to run applications in isolated containers. These containers are like separate compartments, making it simpler to manage tasks. Docker on Ubuntu is handy for flexible and efficient software development and deployment.
Q3. What are the benefits of installing Docker from the official repository?
Installing Docker from the official repository ensures you have the latest stable version. This means you get access to the newest features, security updates, and bug fixes, making your Docker experience smoother and more secure.
Q4. Do I need to update my package repositories before installing Docker on Ubuntu?
Yes, it’s important to update your package repositories. This ensures you have the most recent package information, avoiding potential issues and ensuring a trouble-free installation.
Q5. What is Docker Compose, and why should I consider adding it to my Ubuntu installation?
Docker Compose is a useful tool for managing applications with multiple containers. It simplifies starting and stopping multiple containers at once. Adding Docker Compose to your Ubuntu system gives you more control when dealing with complex systems involving frontend, backend, and database services.
