1.下载docker列表
https://download.docker.com/linux/centos/7/x86_64/stable/Packages/
2.安装rpm docker文件
sudo yum install docker -****.rpm
3.查看docker 安装版本
docker -v
4.查看docker 状态
systemctl status docker
显示inactive
systemctl enable docker
systemctl start docker
显示active
原文：https://www.cnblogs.com/hcfan/p/10627391.html