CentOS7 Failed to start LSB: Bring up/down networking.解决方法

今天用CentOS7 RDO方式安装Openstack，文档上说要disable NetworkManager, 用 network服务才行。 但是我用 service network start命令启动时报错： [[email protected] network-scripts]# service network start Starting network (via systemctl): 

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