1移除以前安装docker
sudo apt-get remove docker docker-engine docker-ce docker.io
2 安装包以允许apt通过HTTPS使用存储库
sudo apt-get -y install apt-transport-httpsca-certificates curl software-properties-common
3 添加docker官方GPG秘钥
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
5 安装稳定版仓库
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 安装docker
sudo apt-get install docker-ce
原文：https://www.cnblogs.com/dzpblogs/p/10655754.html