docs/install/linux/docker-ce/ubuntu.md

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Instructions for installing Docker Engine - Community on Ubuntu	requirements, apt, installation, ubuntu, install, uninstall, upgrade, update	/engine/installation/ubuntulinux/ /installation/ubuntulinux/ /engine/installation/linux/ubuntulinux/ /engine/installation/linux/docker-ce/ubuntu/ /install/linux/ubuntu/ /engine/installation/linux/ubuntu/	Get Docker Engine - Community for Ubuntu	4

To get started with Docker Engine - Community on Ubuntu, make sure you meet the prerequisites, then install Docker.

Prerequisites

Docker EE customers

To install Docker Enterprise Edition (Docker EE), go to Get Docker EE for Ubuntu instead of this topic.

To learn more about Docker EE, see Docker Enterprise Edition{: target="blank" class="" }.

OS requirements

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

• Eoan 19.10
• Bionic 18.04 (LTS)
• Xenial 16.04 (LTS)

Docker Engine - Community is supported on x86_64 (or amd64), armhf, arm64, s390x (IBM Z), and ppc64le (IBM Power) architectures.

Uninstall old versions

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

$ sudo apt-get remove docker docker-engine docker.io containerd runc

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

The contents of /var/lib/docker/, including images, containers, volumes, and networks, are preserved. The Docker Engine - Community package is now called docker-ce.

Supported storage drivers

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

Note: In Docker Engine - Enterprise, btrfs is only supported on SLES. See the documentation on btrfs for more details.

For new installations on version 4 and higher of the Linux kernel, overlay2 is supported and preferred over aufs. Docker Engine - Community uses the overlay2 storage driver by default. If you need to use aufs instead, you need to configure it manually. See aufs

Install Docker Engine - Community

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

• Most users set up Docker's repositories and install from them, for ease of installation and upgrade tasks. This is the recommended approach.

• Some users download the DEB package and install it manually and manage upgrades completely manually. This is useful in situations such as installing Docker on air-gapped systems with no access to the internet.

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

Install using the repository

Before you install Docker Engine - Community for the first time on a new host machine, you need to set up the Docker repository. Afterward, you can install and update Docker from the repository.

Set up the repository

{% assign download-url-base = "https://download.docker.com/linux/ubuntu" %}

1. Update the apt package index:

   $ sudo apt-get update
   

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

   $ sudo apt-get install \
       apt-transport-https \
       ca-certificates \
       curl \
       gnupg-agent \
       software-properties-common
   

3. Add Docker's official GPG key:

   $ curl -fsSL {{ download-url-base }}/gpg | sudo apt-key add -
   

   Verify that you now have the key with the fingerprint 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88, by searching for the last 8 characters of the fingerprint.

   $ sudo apt-key fingerprint 0EBFCD88
   
   pub   rsa4096 2017-02-22 [SCEA]
         9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
   uid           [ unknown] Docker Release (CE deb) <docker@docker.com>
   sub   rsa4096 2017-02-22 [S]
   

4. Use the following command to set up the stable repository. To add the nightly 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 your Ubuntu distribution, such as xenial. Sometimes, in a distribution like 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 untested and unsupported Ubuntu distributions.

   • x86_64 / amd64
   • armhf
   • arm64
   • ppc64le (IBM Power)
   • s390x (IBM Z)

   $ sudo add-apt-repository \
      "deb [arch=amd64] {{ download-url-base }} \
      $(lsb_release -cs) \
      stable"
   

   $ sudo add-apt-repository \
      "deb [arch=armhf] {{ download-url-base }} \
      $(lsb_release -cs) \
      stable"
   

   $ sudo add-apt-repository \
      "deb [arch=arm64] {{ download-url-base }} \
      $(lsb_release -cs) \
      stable"
   

   $ sudo add-apt-repository \
      "deb [arch=ppc64el] {{ download-url-base }} \
      $(lsb_release -cs) \
      stable"
   

   $ sudo add-apt-repository \
      "deb [arch=s390x] {{ download-url-base }} \
      $(lsb_release -cs) \
      stable"
   

Install Docker Engine - Community

1. Update the apt package index.

   $ sudo apt-get update
   

2. Install the latest version of Docker Engine - Community and containerd, or go to the next step to install a specific version:

   $ sudo apt-get install docker-ce docker-ce-cli containerd.io
   

   Got multiple Docker repositories?

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

3. To install a specific version of Docker Engine - Community, list the available versions in the repo, then select and install:

   a. List the versions available in your repo:

   $ apt-cache madison docker-ce
   
     docker-ce | 5:18.09.1~3-0~ubuntu-xenial | {{ download-url-base }}  xenial/stable amd64 Packages
     docker-ce | 5:18.09.0~3-0~ubuntu-xenial | {{ download-url-base }}  xenial/stable amd64 Packages
     docker-ce | 18.06.1~ce~3-0~ubuntu       | {{ download-url-base }}  xenial/stable amd64 Packages
     docker-ce | 18.06.0~ce~3-0~ubuntu       | {{ download-url-base }}  xenial/stable amd64 Packages
     ...
   

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

   $ sudo apt-get install docker-ce=<VERSION_STRING> docker-ce-cli=<VERSION_STRING> containerd.io
   

4. Verify that Docker Engine - Community is installed correctly by running the hello-world image.

   $ sudo docker run hello-world
   

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

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

Upgrade Docker Engine - Community

To upgrade Docker Engine - Community, first run sudo apt-get update, then follow the installation instructions, choosing the new version you want to install.

Install from a package

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

1. Go to [{{ download-url-base }}/dists/]({{ download-url-base }}/dists/){: target="blank" class="" }, choose your Ubuntu version, browse to pool/stable/, choose amd64, armhf, arm64, ppc64el, or s390x, and download the .deb file for the Docker Engine - Community version you want to install.

   Note: To install a nightly package, change the word stable in the URL to nightly. Learn about nightly and test channels.

2. Install Docker Engine - Community, changing the path below to the path where you downloaded the Docker package.

   $ sudo dpkg -i /path/to/package.deb
   

   The Docker daemon starts automatically.

3. Verify that Docker Engine - Community is installed correctly by running the hello-world image.

   $ sudo docker run hello-world
   

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

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

Upgrade Docker Engine - Community

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

{% include install-script.md %}

Uninstall Docker Engine - Community

1. Uninstall the Docker Engine - Community package:

   $ sudo apt-get purge docker-ce
   

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

   $ sudo rm -rf /var/lib/docker
   

You must delete any edited configuration files manually.

Next steps

• Continue to Post-installation steps for Linux

• Continue with the User Guide.