Ubuntu Docker installation

Docker Engine-Community supports the following Ubuntu versions:

• Xenial 16.04 (LTS)
• Bionic 18.04 (LTS)
• Cosmic 18.10
• Disco 19.04
• Other newer versions...

Docker Engine – Community supports x86_64 (or amd64) armhf, arm64, s390x (IBM Z), and ppc64le (IBM Power) architectures.

Automatically install using the official installation script

The installation command is as follows:

curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

You can also use the one-click installation command of daocloud in mainland China:

curl -sSL https://get.daocloud.io/docker | sh

Manual installation

Uninstall old version

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

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

Currently called the Docker Engine-Community package docker-ce .

Install Docker Engine-Community, two methods are introduced below.

Installation using Docker repository

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

Set up warehouse

Update apt package index.

$ sudo apt-get update

Install the apt dependency package to obtain the repository via HTTPS: $ sudo apt-get install /
apt-transport-https /
ca-certificates /
curl /
gnupg-agent /
software-properties-common

Add Docker’s official GPG key:

$ curl -fsSL https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/gpg | sudo apt-key add -

9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88 Verify that you now have the key with the fingerprint 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)
sub rsa4096 2017-02-22 [S]

Use the following commands to set up the stable version repository $ sudo add-apt-repository /
"deb [arch=amd64] https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/ /
$(lsb_release -cs) /
"stable"

Install Docker Engine-Community

Update apt package index.

$ sudo apt-get update

Install the latest versions 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

To install a specific version of Docker Engine-Community, list the available versions in the repository and select one to install. List the versions available in your repository:

$ apt-cache madison docker-ce

docker-ce | 5:18.09.1~3-0~ubuntu-xenial | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu xenial/stable amd64 Packages
docker-ce | 5:18.09.0~3-0~ubuntu-xenial | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu xenial/stable amd64 Packages
docker-ce | 18.06.1~ce~3-0~ubuntu | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu xenial/stable amd64 Packages
docker-ce | 18.06.0~ce~3-0~ubuntu | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu xenial/stable amd64 Packages
…

Use the version string in the second column to install a specific version, for example 5:18.09.1~3-0~ubuntu-xenial.

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

To test whether Docker is installed successfully, enter the following command and print out the following information, indicating that the installation is successful:

$ sudo docker run hello-world

Unable to find image ‘hello-world:latest’ locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete                                               Digest: sha256:c3b4ada4687bbaa170745b3e4dd8ac3f194ca95b2d0518b417fb47e5879d9b5f
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the “hello-world” image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/

For more examples and ideas, visit:
https://docs.docker.com/get-started/

Installation using Shell Script

Docker provides convenience scripts at get.docker.com and test.docker.com for quickly installing edge and test versions of Docker Engine-Community. The source code of the script is in the docker-install repository. It is not recommended to use these scripts in a production environment, and you should be aware of the potential risks before using them:

• The script requires running as root or with sudo privileges. Therefore, scripts should be carefully checked and audited before running them.
• These scripts attempt to detect Linux distributions and versions and configure the package management system for you. Additionally, the script does not allow you to customize any installation parameters. This may result in an unsupported configuration from a Docker perspective or from the perspective of your own organization's guidelines and standards.
• These scripts will install all dependencies and recommendations of the package manager without confirmation. This may install a large number of packages, depending on the host's current configuration.
• The script does not provide an option to specify which version of Docker to install, but instead installs the latest version released in the edge channel.
• Do not use convenience scripts if Docker is already installed on the host using another mechanism.

This example uses the script at get.docker.com to install the latest version of Docker Engine-Community on Linux. To install the latest test version, use test.docker.com instead. In each command below, replace each occurrence of get with test.

$ curl -fsSL https://get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh

If you want to use Docker as a non-root user, you should consider adding the user to the docker group using something like:

$ sudo usermod -aG docker your-user

Uninstall docker

Remove the installation package:

sudo apt-get purge docker-ce

Delete images, containers, configuration files, etc.:

sudo rm -rf /var/lib/docker

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