http://www.runoob.com/docker/ubuntu-docker-install.html

1.选择国内的云服务商，这里选择阿里云为例

curl -sSL http://acs-public-mirror.oss-cn-hangzhou.aliyuncs.com/docker-engine/internet | sh -

2.安装所需要的包

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

3.添加使用 HTTPS 传输的软件包以及 CA 证书

sudo apt-get update
sudo apt-get install apt-transport-https ca-certificates

4.添加GPG密钥

sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

5.添加软件源

echo "deb https://apt.dockerproject.org/repo ubuntu-xenial main" | sudo tee /etc/apt/sources.list.d/docker.list

6.添加成功后更新软件包缓存

sudo apt-get update

7.安装docker

sudo apt-get install docker-engine

8.启动 docker

sudo systemctl enable docker
sudo systemctl start docker