--- description: Instructions for installing Docker on Ubuntu keywords: Docker, Docker documentation, requirements, apt, installation, ubuntu, install, uninstall, upgrade, update redirect_from: - /engine/installation/ubuntulinux/ - /installation/ubuntulinux/ - /engine/installation/linux/ubuntulinux/ title: Get Docker for Ubuntu --- {% assign minor-version = "17.03" %} To get started with Docker on Ubuntu, make sure you [meet the prerequisites](#prerequisites), then [install Docker](#install-docker). ## Prerequisites ### Docker EE customers To install Docker Enterprise Edition (Docker EE), you need to know the Docker EE repository URL associated with your trial or subscription. To get this information: - Go to [https://store.docker.com/?overlay=subscriptions](https://store.docker.com/?overlay=subscriptions). - Choose **Get Details** / **Setup Instructions** within the **Docker Enterprise Edition for Ubuntu** section. - Copy the URL from the field labeled **Copy and paste this URL to download your Edition**. Where the installation instructions differ for Docker EE and Docker CE, use this URL when you see the placeholder text ``. To learn more about Docker EE, see [Docker Enterprise Edition](https://www.docker.com/enterprise-edition/){: target="_blank" class="_" }. ### OS requirements To install Docker, you need the 64-bit version of one of these Ubuntu versions: - Yakkety 16.10 - Xenial 16.04 (LTS) - Trusty 14.04 (LTS) ### Uninstall old versions Older versions of Docker were called `docker` or `docker-engine`. If these are installed, uninstall them: ```bash $ sudo apt-get remove docker docker-engine ``` 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`, and the Docker EE package is now called `docker-ee`. ### Recommended extra packages for Trusty 14.04 Unless you have a strong reason not to, install the `linux-image-extra-*` packages, which allow Docker to use the `aufs` storage drivers. ```bash $ sudo apt-get update $ sudo apt-get install \ linux-image-extra-$(uname -r) \ linux-image-extra-virtual ``` ## Install Docker You can install Docker in different ways, depending on your needs: - Most users [set up Docker's repositories](#install-using-the-repository) 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. ### Install using the repository Before you install Docker 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 The procedure for setting up the repository is different for [Docker CE](#docker-ce) and [Docker EE](#docker-ee). ##### Docker CE {% assign download-url-base = "https://download.docker.com/linux/ubuntu" %} 1. Install packages to allow `apt` to use a repository over HTTPS: ```bash $ sudo apt-get install \ apt-transport-https \ ca-certificates \ curl \ software-properties-common ``` 2. Add Docker's official GPG key: ```bash $ curl -fsSL {{ download-url-base}}/gpg | sudo apt-key add - ``` Verify that the key fingerprint is `9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88`. ```bash $ 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) sub 4096R/F273FCD8 2017-02-22 ``` 3. Use the following command to set up the **stable** repository. You always need the **stable** repository, even if you want to install **edge** builds as well. > **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 have to change > `$(lsb_release -cs)` to your parent Ubuntu distribution. For > example: If you are using `Linux Mint Rafaela`, you could use > `trusty`. To also add the **edge** repository, add `edge` after `stable` on the last line of the command. ```bash $ sudo add-apt-repository \ "deb [arch=amd64] {{ download-url-base }} \ $(lsb_release -cs) \ stable" ``` [Learn about **stable** and **edge** channels](/engine/installation/). ##### Docker EE 1. Install packages to allow `apt` to use a repository over HTTPS: ```bash $ sudo apt-get install \ apt-transport-https \ ca-certificates \ curl \ software-properties-common ``` 2. Add Docker's official GPG key using your customer Docker EE repository URL: ```bash $ curl -fsSL /gpg | sudo apt-key add - ``` Verify that the key fingerprint is `DD91 1E99 5A64 A202 E859 07D6 BC14 F10B 6D08 5F96`. ```bash $ apt-key fingerprint 0EBFCD88 pub 4096R/6D085F96 2017-02-22 Key fingerprint = DD91 1E99 5A64 A202 E859 07D6 BC14 F10B 6D08 5F96 uid [ultimate] Docker Release (EE deb) sub 4096R/91A29FA3 2017-02-22 ``` 3. Use the following command to set up the **stable** repository, replacing `` with the URL you noted down in the [prerequisites](#prerequisites). > **Note**: The `lsb_release -cs` sub-command below returns the name of your > Ubuntu distribution, such as `xenial`. > ```bash $ sudo add-apt-repository \ "deb [arch=amd64] \ $(lsb_release -cs) \ stable-{{ minor-version }}" ``` #### Install Docker 1. Update the `apt` package index. ```bash $ sudo apt-get update ``` 2. Install the latest version of Docker, or go to the next step to install a specific version. Any existing installation of Docker is replaced. Use this command to install the latest version of Docker: | Docker Edition | Command | |----------------|-------------------------------------| | Docker CE | `sudo apt-get install docker-ce` | | Docker EE | `sudo apt-get install docker-ee` | > **Warning**: If you have multiple Docker repositories enabled, installing > or updating without specifying a version in the `apt-get install` or > `apt-get update` command will always install the highest possible version, > which may not be appropriate for your stability needs. 3. On production systems, you should install a specific version of Docker instead of always using the latest. This output is truncated. List the available versions. For Docker EE customers, use `docker-ee` where you see `docker-ce`. ```bash $ apt-cache madison docker-ce docker-ce | {{ minor-version }}.0~ce-0~ubuntu-xenial | {{ download-url-base}} xenial/stable amd64 Packages ``` The contents of the list depend upon which repositories are enabled, and will be specific to your version of Ubuntu (indicated by the `xenial` suffix on the version, in this example). Choose a specific version to install. The second column is the version string. The third column is the repository name, which indicates which repository the package is from and by extension its stability level. To install a specific version, append the version string to the package name and separate them by an equals sign (`=`): | Docker Edition | Command | |----------------|-----------------------------------------------| | Docker CE | `sudo apt-get install docker-ce=` | | Docker EE | `sudo apt-get install docker-ee=` | The Docker daemon starts automatically. 4. Verify that Docker CE or Docker EE is installed correctly by running the `hello-world` image. ```bash $ 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 is installed and running. You need to use `sudo` to run Docker commands. Continue to [Linux postinstall](linux-postinstall.md) to allow non-privileged users to run Docker commands and for other optional configuration steps. #### Upgrade Docker To upgrade Docker, first run `sudo apt-get update`, then follow the [installation instructions](#install-docker), choosing the new version you want to install. ### Install from a package If you cannot use Docker's repository to install Docker, you can download the `.deb` file for your release and install it manually. You will need to download a new file each time you want to upgrade Docker. 1. This step is different for Docker CE and Docker EE. - **Docker CE**: Go to [{{ download-url-base }}/dists/]({{ download-url-base }}/dists/), choose your Ubuntu version, browse to `stable/pool/stable/amd64/`, and download the `.deb` file for the Docker version you want to install and for your version of Ubuntu. > **Note**: To install an **edge** package, change the word > `stable` in the URL to `edge`. > [Learn about **stable** and **edge** channels](/engine/installation/). - **Docker EE**: Go to the Docker EE repository URL associated with your trial or subscription in your browser. Go to `x86_64/stable-{{ minor-version }}` and download the `.deb` file for the Docker version you want to install. 2. Install Docker, changing the path below to the path where you downloaded the Docker package. ```bash $ sudo dpkg -i /path/to/package.deb ``` The Docker daemon starts automatically. 3. Verify that Docker CE or Docker EE is installed correctly by running the `hello-world` image. ```bash $ 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 is installed and running. You need to use `sudo` to run Docker commands. Continue to [Post-installation steps for Linux](linux-postinstall.md) to allow non-privileged users to run Docker commands and for other optional configuration steps. #### Upgrade Docker To upgrade Docker, download the newer package file and repeat the [installation procedure](#install-from-a-package), pointing to the new file. ## Uninstall Docker 1. Uninstall the Docker package: | Docker Edition | Command | |----------------|--------------------------------| | Docker CE | `sudo apt-get purge docker-ce` | | Docker EE | `sudo apt-get purge docker-ee` | 2. Images, containers, volumes, or customized configuration files on your host are not automatically removed. To delete all images, containers, and volumes: ```bash $ sudo rm -rf /var/lib/docker ``` You must delete any edited configuration files manually. ## Next steps - Continue to [Post-installation steps for Linux](linux-postinstall.md) - Continue with the [User Guide](../../userguide/index.md).