docker Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? 问题解决

ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock (code=exited, status=1/FAILURE)

 

Failed to start Docker Application Container Engine.

 

docker Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

 

可以先用以下命令解决：

systemctl daemon-reload

systemctl restart docker

 

如果以上命令不足以解决，

这些问题可能最终的原因是：

/etc/docker/daemon.json里的

{
    "registry-mirrors":["https://registry.docker-cn.com"]
}

有空格，要删除空格，可以缩进