Download Docker Linux Ubuntu

2/13/2022by admin
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  4. Download Docker Linux Ubuntu 64-bit

This is the first in our Docker tutorial series. In this article, you’ll learn how to install the latest Docker on Ubuntu and how to configure it.

By latest Docker, I mean the latest Docker Engine Community Edition (CE). Ubuntu also has Docker packages available in their repository, however, I would advise using the community edition.

For this tutorial, I created a new Ubuntu server on Linode. You may sign up for Linode and deploy your own Linux server in less than two minutes. They even provide $60 free credits to our readers.

Installing Docker on Ubuntu

Ubuntu Hirsute 21.04; Ubuntu Groovy 20.10; Ubuntu Focal 20.04 (LTS) Ubuntu Bionic 18.04 (LTS) To check the OS version of Linux, use-cat /etc/.release. Check if you have already install docker on machine-docker -version. Uninstall the older version of Docker if you have any, to do so-sudo apt-get remove docker docker-engine containerd. Docker requires a 64-bit operating system and supports Ubuntu 18.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.10 & Ubuntu 19.04.

So, I presume you have an Ubuntu system installed. The first thing you should do is to update your system:

If you already have any kind of Docker package installed, you should remove them as well to avoid conflict.

Download a Docker Image in Ubuntu. To run a Docker container, first, you need to download an image from Docker Hub – provides free images from its repositories. For example, to download a Docker image called CentOS 7, issue the following command. Open Ubuntu WSL App. Currently, there are two long term Ubuntu versions available on Microsoft Store to install: Ubuntu 18.04 LTS & Ubuntu 20.04 LTS Linux. To get started with Docker Engine on Ubuntu, make sure youmeet the prerequisites, theninstall Docker. Install Compose on Linux systems. On Linux, you can download the Docker Compose binary from the Compose repository release page on GitHub. Follow the instructions from the link, which involve running the curl command in your terminal to download the binaries. These step-by-step instructions are also included below.

Now the following steps will get you an operational version of Docker CE up and running on your system.

Step 1: Enable installation via HTTPS

You need the following packages for using apt over https:

Some of the packages might already be installed on your system.

Step 2: Add the official Docker GPG key

Before you add the new repository from Docker, add its GPG key. Use the curl command to download the GPG key and then add it using apt-key command. You can combine both commands with pipe:


It’s a good idea to verify the key to avoid bad surprises:

It’s output should be like this:

Step 3: Add the Docker repository

Now that you have the repository key added, add the repository itself:

If you are using Ubuntu 16.04, you may have to update the repository as well:

Step 4: Install Docker

Everything is set. Now you should install Docker and its related packages:

Setting up Docker on Ubuntu

You have Docker installed but it’s not over just yet. You need to do some other basic setup and configuration in order to run it smoothly.

1. Run docker without sudo

One thing you should do is to add your username to docker group so that you don’t need to use sudo all the time.

The docker group may already exist. Use the groupadd command to create the group docker:

Add your username or other users to this group with usermod command. Change username with the actual user name.

2. Verify docker installation by running a sample container

First, restart Ubuntu and then confirm that Docker is running fine by downloading and running the hello-world docker image:

It’s output should be like this:

To give you a better understanding, let me explain what happened here.

  • The Docker client contacted the Docker daemon.
  • The Docker daemon pulled the “hello-world” image from the Docker Hub.
  • The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading.
  • The Docker daemon streamed that output to the Docker client, which sent it to your terminal.

3. Run Docker at each boot

To make sure that Docker runs automatically on each boot, use this command:

That’s it. You have just learned to install Docker CE on Ubuntu Linux. Stay tuned for more Docker tutorials in this series.

Estimated reading time: 10 minutes

A Linux Dev Environment on Windows with WSL 2, Docker Desktop And the docker docs. Docker Desktop WSL 2 backend. Below is valid only for WSL1. It seems that docker cannot run inside WSL. What they propose is to connect the WSL to your docker desktop running in windows: Setting Up Docker for Windows and WSL. In the docker forums they also refer. Before starting the tutorial, I am assuming that you already have the WSL with Ubuntu on your Windows 10 or server system. If not then follow the tutorial: Steps to enable WSL with Ubuntu. Open Ubuntu WSL App. Currently, there are two long term Ubuntu versions available on Microsoft Store to install: Ubuntu 18.04 LTS & Ubuntu 20.04 LTS Linux.

To get started with Docker Engine on Ubuntu, make sure youmeet the prerequisites, theninstall Docker.


OS requirements

To install Docker Engine, you need the 64-bit version of one of these Ubuntuversions:

  • Ubuntu Groovy 20.10
  • Ubuntu Focal 20.04 (LTS)
  • Ubuntu Bionic 18.04 (LTS)
  • Ubuntu Xenial 16.04 (LTS)

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Docker Engine is supported on x86_64 (or amd64), armhf, and arm64 architectures.

Uninstall old versions

Older versions of Docker were called docker,, or docker-engine.If these are installed, uninstall them:

It’s OK if apt-get reports that none of these packages are installed.

The contents of /var/lib/docker/, including images, containers, volumes, andnetworks, are preserved. If you do not need to save your existing data, and want tostart with a clean installation, refer to the uninstall Docker Enginesection at the bottom of this page.

Supported storage drivers

Docker Engine on Ubuntu supports overlay2, aufs and btrfs storage drivers.

Docker Engine uses the overlay2 storage driver by default. If you need to useaufs instead, you need to configure it manually.See use the AUFS storage driver

Installation methods

You can install Docker Engine in different ways, depending on your needs:

  • Most usersset up Docker’s repositories and installfrom them, for ease of installation and upgrade tasks. This is therecommended approach.

  • Some users download the DEB package andinstall it manually and manageupgrades completely manually. This is useful in situations such as installingDocker on air-gapped systems with no access to the internet.

  • In testing and development environments, some users choose to use automatedconvenience scripts to install Docker.

Install using the repository

Docker In Wsl Ubuntu Commands

Before you install Docker Engine for the first time on a new host machine, you needto set up the Docker repository. Afterward, you can install and update Dockerfrom the repository.

Set up the repository

  1. Update the apt package index and install packages to allow apt to use arepository over HTTPS:

  2. Add Docker’s official GPG key:

  3. Use the following command to set up the stable repository. To add thenightly or test repository, add the word nightly or test (or both)after the word stable in the commands below. Learn about nightly and test channels.

    Note: The lsb_release -cs sub-command below returns the name of yourUbuntu distribution, such as xenial. Sometimes, in a distributionlike Linux Mint, you might need to change $(lsb_release -cs)to your parent Ubuntu distribution. For example, if you are using Linux Mint Tessa, you could use bionic. Docker does not offer any guarantees on untestedand unsupported Ubuntu distributions.

Install Docker Engine

  1. Update the apt package index, and install the latest version of DockerEngine and containerd, or go to the next step to install a specific version:

    Got multiple Docker repositories?

    If you have multiple Docker repositories enabled, installingor updating without specifying a version in the apt-get install orapt-get update command always installs the highest possible version,which may not be appropriate for your stability needs.

  2. To install a specific version of Docker Engine, list the available versionsin the repo, then select and install:

    a. List the versions available in your repo:

    b. Install a specific version using the version string from the second column, for example, 5:18.09.1~3-0~ubuntu-xenial.

  3. Verify that Docker Engine is installed correctly by running the hello-worldimage.

    This command downloads a test image and runs it in a container. When thecontainer runs, it prints an informational message and exits.

Docker Engine is installed and running. The docker group is created but no usersare added to it. You need to use sudo to run Docker commands.Continue to Linux postinstall to allow non-privilegedusers to run Docker commands and for other optional configuration steps.

Upgrade Docker Engine

To upgrade Docker Engine, first run sudo apt-get update, then follow theinstallation instructions, choosing the newversion you want to install.

Install from a package

If you cannot use Docker’s repository to install Docker Engine, you can download the.deb file for your release and install it manually. You need to downloada new file each time you want to upgrade Docker.

  1. Go to,choose your Ubuntu version, then browse to pool/stable/, choose amd64,armhf, or arm64, and download the .deb file for the Docker Engineversion you want to install.

    Note: To install a nightly or test (pre-release) package,change the word stable in the above URL to nightly or test.Learn about nightly and test channels.

  2. Install Docker Engine, changing the path below to the path where you downloadedthe Docker package.

    The Docker daemon starts automatically.

  3. Verify that Docker Engine is installed correctly by running the hello-worldimage.

    This command downloads a test image and runs it in a container. When thecontainer runs, it prints an informational message and exits.

Docker Engine is installed and running. The docker group is created but no usersare added to it. You need to use sudo to run Docker commands.Continue to Post-installation steps for Linux to allownon-privileged users to run Docker commands and for other optional configurationsteps.

Upgrade Docker Engine

To upgrade Docker Engine, download the newer package file and repeat theinstallation procedure, pointing to the new file.

Install using the convenience script

Docker provides convenience scripts at get.docker.comand for installing edge andtesting versions of Docker Engine - Community into development environments quickly andnon-interactively. The source code for the scripts is in thedocker-install repository.Using these scripts is not recommended for productionenvironments, and you should understand the potential risks before you usethem:

  • The scripts require root or sudo privileges to run. Therefore,you should carefully examine and audit the scripts before running them.
  • The scripts attempt to detect your Linux distribution and version andconfigure your package management system for you. In addition, the scripts donot allow you to customize any installation parameters. This may lead to anunsupported configuration, either from Docker’s point of view or from your ownorganization’s guidelines and standards.
  • The scripts install all dependencies and recommendations of the packagemanager without asking for confirmation. This may install a large number ofpackages, depending on the current configuration of your host machine.
  • The script does not provide options to specify which version of Docker to install,and installs the latest version that is released in the “edge” channel.
  • Do not use the convenience script if Docker has already been installed on thehost machine using another mechanism.

This example uses the script at toinstall the latest release of Docker Engine - Community on Linux. To install the latesttesting version, use instead. Ineach of the commands below, replace each occurrence of get with test.


Always examine scripts downloaded from the internet beforerunning them locally.

If you would like to use Docker as a non-root user, you should now consideradding your user to the “docker” group with something like:


Remember to log out and back in for this to take effect!


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Adding a user to the “docker” group grants them the ability to run containerswhich can be used to obtain root privileges on the Docker host. Refer toDocker Daemon Attack Surfacefor more information.

Docker Engine - Community is installed. It starts automatically on DEB-based distributions. OnRPM-based distributions, you need to start it manually using the appropriatesystemctl or service command. As the message indicates, non-root users can’trun Docker commands by default.



To install Docker without root privileges, seeRun the Docker daemon as a non-root user (Rootless mode).

Upgrade Docker after using the convenience script

If you installed Docker using the convenience script, you should upgrade Dockerusing your package manager directly. There is no advantage to re-running theconvenience script, and it can cause issues if it attempts to re-addrepositories which have already been added to the host machine.

Download Docker Linux Ubuntu

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Download Docker Linux Ubuntu 64-bit

Uninstall Docker Engine

  1. Uninstall the Docker Engine, CLI, and Containerd packages:

  2. Images, containers, volumes, or customized configuration files on your hostare not automatically removed. To delete all images, containers, andvolumes:

Install Docker In Wsl Ubuntu

You must delete any edited configuration files manually.

Next steps

  • Continue to Post-installation steps for Linux.
  • Review the topics in Develop with Docker to learn how to build new applications using Docker.

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requirements, apt, installation, ubuntu, install, uninstall, upgrade, update
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