Get Docker CE for Ubuntu

https://docs.docker.com/install/linux/docker-ce/ubuntu/

Uninstall old versions

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

docker的相关文件保存在/var/lib/docker/目录下，现在新的包名叫docker-ce

三种安装方式

1. repository安装

   set up the repository

   ​ $ sudo apt-get update

   ​ $ sudo apt-get install apt-transport-https ca-certificates curl software-properties-common

   ​ $ curl -fsSL https://download.docker.com/linux/ubuntu/gpg (opens new window) | sudo apt-key add -

   ​ $ sudo apt-key fingerprint 0EBFCD88 #通过查找最后8个字符以确认拥有9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88密匙

   ​ $ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu (opens new window) $(lsb_release -cs) stable

   install docker ce

   ​ $ sudo apt-get update

   ​ $ sudo apt-get install docker-ce

   ​ $ sudo apt-cache madison docker-ce #查找可用版本

   ​ $ sudo apt-get install docker-ce= #安装指定版本，生产环境一般不安装最新版本(apt-get install docker-ce=17.12.1~ce-0~ubuntu)

   ​ $ sudo docker run hello-world

2. package安装

   download .deb file

   ​ https://download.docker.com/linux/ubuntu/dists/

   ​ pool/stable/amd64=>.deb file

   ​ $ wget https://download.docker.com/linux/ubuntu/dists/xenial/pool/stable/amd64/docker-ce_17.12.1~ce-0~ubuntu_amd64.deb

   http://releases.ubuntu.com/ (opens new window) (查看对应的版本)

   ​ $ sudo dpkg -i docker-ce_17.12.1~ce-0~ubuntu_amd64.deb

   ​ $ sudo docker run hello-world

3. 脚本安装

​ $ curl -fsSL get.docker.com (opens new window) -o get-docker.sh

​ $ sudo sh get-docker.sh