docker

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

https://mirrors.tuna.tsinghua.edu.cn/help/docker-ce/

for ubutun 16.04

sudo apt-get update
sudo apt-get install 
    apt-transport-https 
    ca-certificates 
    curl 
    gnupg-agent 
    software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository 
   "deb [arch=amd64] https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/ubuntu 
   $(lsb_release -cs) 
   stable"
sudo apt-get update
sudo apt-get install docker-ce