docker启动时出现Job for docker.service failed because the control process exited with error code错误

问题分析 以太坊环境需要用到docker，然后很多时候虚拟机没有设置docker自启动，因此在重启docker的时候，常常出现： Job for docker.service failed because the control process exited with error code. See “systemctl status docker.service” and “journalctl

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