刚在新的Centos上安装Docker-CE,后运行docker run hello-world报错Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

解决办法

systemctl daemon-reload
service docker restart
service docker status 
docker run hello-world

最后一行命令是创建一个测试容器 测试完成后请删除