debian9安装docker

问题：出现官网源无法完全下载的问题

解决方案：

1.换源

sudo apt edit-sources 或是 sudoedit /etc/apt/sources.list然后默认 然后就可以写入了

然后就可以加入阿里镜像源非常nice!

deb http://mirrors.163.com/debian/ stretch main non-free contrib
deb http://mirrors.163.com/debian/ stretch-updates main non-free contrib
deb http://mirrors.163.com/debian/ stretch-backports main non-free contrib
deb-src http://mirrors.163.com/debian/ stretch main non-free contrib
deb-src http://mirrors.163.com/debian/ stretch-updates main non-free contrib
deb-src http://mirrors.163.com/debian/ stretch-backports main non-free contrib
deb http://mirrors.163.com/debian-security/ stretch/updates main non-free contrib
deb-src http://mirrors.163.com/debian-security/ stretch/updates main non-free contrib

更新源列表并安装依赖文件

sudo apt update
sudo apt install -y  apt-transport-https ca-certificates curl gnupg2 software-properties-common
获取密钥

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

1)  添加docker下载源（amd64版本，如使用树莓派开发板则使用arm版本）：

sudo add-apt-repository

   "deb [arch=amd64] https://mirrors.ustc.edu.cn/docker-ce/linux/debian

   $(lsb_release -cs) stable"

 以下指令均以sudo执行

apt update
apt install -y docker-ce
systemctl start docker
systemctl enable docker