1、apt update
2、curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
3、echo 'deb https://download.docker.com/linux/debian stretch stable'> /etc/apt/sources.list.d/docker.list
4、apt-get install apt-transport-https ca-certificates curl gnupg2 software-properties-common
输入：y
在这里选择：yes
5、apt update
6、sudo apt install docker.io
7、验证是否安装成功：docker
