1移除以前安裝docker

sudo apt-get remove docker docker-engine docker-ce docker.io 

2 安裝包以允許apt通過HTTPS使用存儲庫

 sudo apt-get -y install apt-transport-httpsca-certificates curl software-properties-common

3 添加docker官方GPG秘鑰

 curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - 

5

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

5 更新源

sudo apt-get update

6 安裝docker

sudo apt-get install docker-ce 

ubuntu 下 docker安裝