原文

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

$ sudo service docker restart

$ sudo service docker status (should see active (running))

$ sudo docker run hello-world

docker 客户端通过unix:///var/run/docker.sock与docker daemon通信，unix:///var/run/docker.sock需要管理员权限才能访问，所以要么运行sudo docker run hello-world，要么将当前用户添加在docker用户组中

sudo usermod -aG docker $USER

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