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

docker本身已安裝正常,當執行docker images命令時，出現:

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

問題原因: 因爲docker服務沒有啓動，所以在相應的/var/run/ 路徑下找不到docker的進程

執行 service docker start |systemctl start docker 命令，啓動docker服務，返回:

Redirecting to /bin/systemctl start docker.service

此時進程啓動成功，再執行docker images，問題解決!