mirror of https://github.com/docker/docs.git
343 lines
11 KiB
Markdown
343 lines
11 KiB
Markdown
---
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description: Instructions for installing Docker on Ubuntu
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keywords: Docker, Docker documentation, requirements, apt, installation, ubuntu, install, uninstall, upgrade, update
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redirect_from:
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- /engine/installation/ubuntulinux/
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- /installation/ubuntulinux/
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- /engine/installation/linux/ubuntulinux/
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title: Get Docker for Ubuntu
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---
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{% assign minor-version = "17.03" %}
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To get started with Docker on Ubuntu, make sure you
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[meet the prerequisites](#prerequisites), then
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[install Docker](#install-docker).
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## Prerequisites
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### Docker EE customers
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To install Docker Enterprise Edition (Docker EE), you need to know the Docker EE
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repository URL associated with your trial or subscription. To get this information:
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- Go to [https://store.docker.com/?overlay=subscriptions](https://store.docker.com/?overlay=subscriptions).
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- Choose **Get Details** / **Setup Instructions** within the
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**Docker Enterprise Edition for Ubuntu** section.
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- Copy the URL from the field labeled
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**Copy and paste this URL to download your Edition**.
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Where the installation instructions differ for Docker EE and Docker CE, use this
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URL when you see the placeholder text `<DOCKER-EE-URL>`.
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To learn more about Docker EE, see
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[Docker Enterprise Edition](https://www.docker.com/enterprise-edition/){: target="_blank" class="_" }.
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### OS requirements
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To install Docker, you need the 64-bit version of one of these Ubuntu versions:
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- Yakkety 16.10
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- Xenial 16.04 (LTS)
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- Trusty 14.04 (LTS)
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### Uninstall old versions
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Older versions of Docker were called `docker` or `docker-engine`. If these are
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installed, uninstall them:
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```bash
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$ sudo apt-get remove docker docker-engine
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```
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It's OK if `apt-get` reports that none of these packages are installed.
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The contents of `/var/lib/docker/`, including images, containers, volumes, and
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networks, are preserved. The Docker CE package is now called `docker-ce`, and
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the Docker EE package is now called `docker-ee`.
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### Recommended extra packages for Trusty 14.04
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Unless you have a strong reason not to, install the
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`linux-image-extra-*` packages, which allow Docker to use the `aufs` storage
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drivers.
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```bash
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$ sudo apt-get update
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$ sudo apt-get install \
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linux-image-extra-$(uname -r) \
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linux-image-extra-virtual
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```
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## Install Docker
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You can install Docker in different ways, depending on your needs:
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- Most users
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[set up Docker's repositories](#install-using-the-repository) and install
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from them, for ease of installation and upgrade tasks. This is the
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recommended approach.
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- Some users download the DEB package and install it manually and manage
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upgrades completely manually. This is useful in situations such as installing
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Docker on air-gapped systems with no access to the internet.
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### Install using the repository
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Before you install Docker for the first time on a new host machine, you need to
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set up the Docker repository. Afterward, you can install and update Docker from
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the repository.
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#### Set up the repository
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The procedure for setting up the repository is different for [Docker CE](#docker-ce) and
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[Docker EE](#docker-ee).
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##### Docker CE
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{% assign download-url-base = "https://download.docker.com/linux/ubuntu" %}
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1. Install packages to allow `apt` to use a repository over HTTPS:
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```bash
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$ sudo apt-get install \
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apt-transport-https \
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ca-certificates \
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curl \
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software-properties-common
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```
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2. Add Docker's official GPG key:
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```bash
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$ curl -fsSL {{ download-url-base}}/gpg | sudo apt-key add -
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```
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Verify that the key fingerprint is `9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88`.
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```bash
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$ sudo apt-key fingerprint 0EBFCD88
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pub 4096R/0EBFCD88 2017-02-22
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Key fingerprint = 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88
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uid Docker Release (CE deb) <docker@docker.com>
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sub 4096R/F273FCD8 2017-02-22
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```
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3. Use the following command to set up the **stable** repository. You always
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need the **stable** repository, even if you want to install **edge** builds
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as well.
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> **Note**: The `lsb_release -cs` sub-command below returns the name of your
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> Ubuntu distribution, such as `xenial`.
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>
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> Sometimes, in a distribution like Linux Mint, you might have to change
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> `$(lsb_release -cs)` to your parent Ubuntu distribution. For
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> example: If you are using `Linux Mint Rafaela`, you could use
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> `trusty`.
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To also add the **edge** repository, add `edge` after `stable` on the last
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line of the command.
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```bash
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$ sudo add-apt-repository \
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"deb [arch=amd64] {{ download-url-base }} \
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$(lsb_release -cs) \
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stable"
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```
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[Learn about **stable** and **edge** channels](/engine/installation/).
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##### Docker EE
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1. Install packages to allow `apt` to use a repository over HTTPS:
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```bash
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$ sudo apt-get install \
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apt-transport-https \
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ca-certificates \
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curl \
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software-properties-common
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```
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2. Add Docker's official GPG key using your customer Docker EE repository URL:
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```bash
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$ curl -fsSL <DOCKER-EE-URL>/gpg | sudo apt-key add -
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```
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Verify that the key fingerprint is `DD91 1E99 5A64 A202 E859 07D6 BC14 F10B 6D08 5F96`.
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```bash
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$ apt-key fingerprint 0EBFCD88
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pub 4096R/6D085F96 2017-02-22
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Key fingerprint = DD91 1E99 5A64 A202 E859 07D6 BC14 F10B 6D08 5F96
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uid [ultimate] Docker Release (EE deb) <docker@docker.com>
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sub 4096R/91A29FA3 2017-02-22
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```
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3. Use the following command to set up the **stable** repository, replacing
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`<DOCKER-EE-URL>` with the URL you noted down in the
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[prerequisites](#prerequisites).
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> **Note**: The `lsb_release -cs` sub-command below returns the name of your
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> Ubuntu distribution, such as `xenial`.
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>
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```bash
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$ sudo add-apt-repository \
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"deb [arch=amd64] <DOCKER-EE-URL> \
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$(lsb_release -cs) \
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stable-{{ minor-version }}"
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```
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#### Install Docker
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1. Update the `apt` package index.
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```bash
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$ sudo apt-get update
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```
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2. Install the latest version of Docker, or go to the next step to install a
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specific version. Any existing installation of Docker is replaced.
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Use this command to install the latest version of Docker:
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| Docker Edition | Command |
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|----------------|-------------------------------------|
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| Docker CE | `sudo apt-get install docker-ce` |
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| Docker EE | `sudo apt-get install docker-ee` |
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> **Warning**: If you have multiple Docker repositories enabled, installing
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> or updating without specifying a version in the `apt-get install` or
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> `apt-get update` command will always install the highest possible version,
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> which may not be appropriate for your stability needs.
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3. On production systems, you should install a specific version of Docker
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instead of always using the latest. This output is truncated. List the
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available versions. For Docker EE customers, use `docker-ee` where you see
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`docker-ce`.
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```bash
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$ apt-cache madison docker-ce
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docker-ce | {{ minor-version }}.0~ce-0~ubuntu-xenial | {{ download-url-base}} xenial/stable amd64 Packages
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```
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The contents of the list depend upon which repositories are enabled,
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and will be specific to your version of Ubuntu (indicated by the `xenial`
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suffix on the version, in this example). Choose a specific version to
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install. The second column is the version string. The third column is the
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repository name, which indicates which repository the package is from and
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by extension its stability level. To install a specific version, append the
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version string to the package name and separate them by an equals sign (`=`):
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| Docker Edition | Command |
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|----------------|-----------------------------------------------|
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| Docker CE | `sudo apt-get install docker-ce=<VERSION>` |
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| Docker EE | `sudo apt-get install docker-ee=<VERSION>` |
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The Docker daemon starts automatically.
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4. Verify that Docker CE or Docker EE is installed correctly by running the
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`hello-world` image.
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```bash
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$ sudo docker run hello-world
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```
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This command downloads a test image and runs it in a container. When the
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container runs, it prints an informational message and exits.
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Docker is installed and running. You need to use `sudo` to run Docker commands.
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Continue to [Linux postinstall](linux-postinstall.md) to allow
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non-privileged users to run Docker commands and for other optional configuration
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steps.
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#### Upgrade Docker
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To upgrade Docker, first run `sudo apt-get update`, then follow the
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[installation instructions](#install-docker), choosing the new version you want
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to install.
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### Install from a package
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If you cannot use Docker's repository to install Docker, you can download the
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`.deb` file for your release and install it manually. You will need to download
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a new file each time you want to upgrade Docker.
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1. This step is different for Docker CE and Docker EE.
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- **Docker CE**: Go to
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[{{ download-url-base }}/dists/]({{ download-url-base }}/dists/), choose your
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Ubuntu version, browse to `stable/pool/stable/amd64/`, and download the
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`.deb` file for the Docker version you want to install and for your
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version of Ubuntu.
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> **Note**: To install an **edge** package, change the word
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> `stable` in the URL to `edge`.
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> [Learn about **stable** and **edge** channels](/engine/installation/).
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- **Docker EE**: Go to the Docker EE repository URL associated with your
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trial or subscription in your browser. Go to `x86_64/stable-{{ minor-version }}` and download
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the `.deb` file for the Docker version you want to install.
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2. Install Docker, changing the path below to the path where you downloaded
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the Docker package.
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```bash
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$ sudo dpkg -i /path/to/package.deb
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```
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The Docker daemon starts automatically.
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3. Verify that Docker CE or Docker EE is installed correctly by running the
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`hello-world` image.
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```bash
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$ sudo docker run hello-world
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```
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This command downloads a test image and runs it in a container. When the
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container runs, it prints an informational message and exits.
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Docker is installed and running. You need to use `sudo` to run Docker commands.
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Continue to [Post-installation steps for Linux](linux-postinstall.md) to allow
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non-privileged users to run Docker commands and for other optional configuration
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steps.
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#### Upgrade Docker
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To upgrade Docker, download the newer package file and repeat the
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[installation procedure](#install-from-a-package), pointing to the new file.
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## Uninstall Docker
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1. Uninstall the Docker package:
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| Docker Edition | Command |
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|----------------|--------------------------------|
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| Docker CE | `sudo apt-get purge docker-ce` |
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| Docker EE | `sudo apt-get purge docker-ee` |
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2. Images, containers, volumes, or customized configuration files on your host
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are not automatically removed. To delete all images, containers, and
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volumes:
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```bash
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$ sudo rm -rf /var/lib/docker
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```
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You must delete any edited configuration files manually.
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## Next steps
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- Continue to [Post-installation steps for Linux](linux-postinstall.md)
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- Continue with the [User Guide](../../userguide/index.md).
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