Centos安装docker

一句一句的执行：

yum-config-manager   --add-repo   http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y yum-utils   device-mapper-persistent-data   lvm2
yum install -y docker-ce docker-ce-cli containerd.io
docker -v
systemctl start docker
docker ps
docker run hello-world

出现以下这句，代表docker安装成功。

Hello from Docker!
This message shows that your installation appears to be working correctly.