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Instructions for installing Docker CE 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/
Get Docker CE for Ubuntu 4

To get started with Docker CE 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 CE, you need the 64-bit version of one of these Ubuntu versions:

  • Artful 17.10 (Docker CE 17.11 Edge and higher only)
  • Xenial 16.04 (LTS)
  • Trusty 14.04 (LTS)

Docker CE is supported on Ubuntu on x86_64, armhf, s390x (IBM Z), and ppc64le (IBM Power) architectures.

ppc64le and s390x limitations: Packages for IBM Z and Power architectures are only available on Ubuntu Xenial and above.

Uninstall old versions

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

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

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 CE package is now called docker-ce.

Supported storage drivers

Docker CE on Ubuntu supports overlay2 and aufs storage drivers.

  • For new installations on version 4 and higher of the Linux kernel, overlay2 is supported and preferred over aufs.
  • For version 3 of the Linux kernel, aufs is supported because overlay or overlay2 drivers are not supported by that kernel version.

If you need to use aufs, you need to do additional preparation as outlined below.

Extra steps for aufs

  • Xenial 16.04 and newer
  • Trusty 14.04

For Ubuntu 16.04 and higher, the Linux kernel includes support for OverlayFS, and Docker CE uses the overlay2 storage driver by default. If you need to use aufs instead, you need to configure it manually. See aufs

Unless you have a strong reason not to, install the linux-image-extra-* packages, which allow Docker to use the aufs storage drivers.

$ sudo apt-get update

$ sudo apt-get install \
    linux-image-extra-$(uname -r) \
    linux-image-extra-virtual

Install Docker CE

You can install Docker CE 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 CE 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 \
    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   4096R/0EBFCD88 2017-02-22
      Key fingerprint = 9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid                  Docker Release (CE deb) <docker@docker.com>
sub   4096R/F273FCD8 2017-02-22

  4. Use the following command to set up the stable repository. You always need the stable repository, even if you want to install builds from the edge or test repositories as well. To add the edge or test repository, add the word edge or test (or both) after the word stable in the commands below.

    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 Rafaela, you could use trusty.

    • x86_64 / amd64
    • armhf
    • IBM Power (ppc64le)
    • IBM Z (s390x)
    $ 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=ppc64el] {{ download-url-base }} \
   $(lsb_release -cs) \
   stable"

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

    Note: Starting with Docker 17.06, stable releases are also pushed to the edge and test repositories.

    Learn about stable and edge channels.

Install Docker CE

  1. Update the apt package index.

    $ sudo apt-get update

  2. Install the latest version of Docker CE, or go to the next step to install a specific version:

    $ sudo apt-get install docker-ce

    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 CE, 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 | {{ site.docker_ce_stable_version }}.0~ce-0~ubuntu | {{ download-url-base }} xenial/stable amd64 Packages

    b. Install a specific version by its fully qualified package name, which is the package name (docker-ce) plus the version string (2nd column) up to the first hyphen, separated by a an equals sign (=), for example, docker-ce=18.03.0.ce.

    $ sudo apt-get install docker-ce=<VERSION>

    The Docker daemon starts automatically.

  4. Verify that Docker CE 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 CE 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 CE

To upgrade Docker CE, 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 CE, 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 CE.

  1. Go to [{{ download-url-base }}/dists/]({{ download-url-base }}/dists/), choose your Ubuntu version, browse to pool/stable/ and choose amd64, armhf, ppc64el, or s390x. Download the .deb file for the Docker version you want to install.

    Note: To install an edge package, change the word stable in the URL to edge. Learn about stable and edge channels.

  2. Install Docker CE, 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 CE 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 CE 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 CE

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

{% include install-script.md %}

Uninstall Docker CE

  1. Uninstall the Docker CE 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