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Docker實踐：Cannot connect to the Docker daemon.

查看docker daemon是否在運行 ?

[root@localhost openec]# ?ps aux | grep docker

root ? ? ?3030 ?0.0 ?0.0 112656 ? 984 pts/0 ? ?S+ ? 16:20 ? 0:00 grep --color=auto docker

啟動docker

[root@localhost openec]# service docker start

Redirecting to /bin/systemctl start ?docker.service