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

 阿里云的机器重启之后，想启动docker却报了下面的问题

/usr/bin/docker-current: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
See '/usr/bin/docker-current run --help'.

确认了下是docker没有启动

ubuntu的服务器上启动下docker的service即可

service docker start