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问题记录：

centos7（VM环境）配置完毕网卡后重启网络服务报错如下：

Process: 13467 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/SUCCESS)11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists11月 3 19:55:55 skyfans network[13467]: RTNETLINK answers: File exists

处理方法：

分析了好久，发现重启后网络服务和NetworkManager 服务有冲突，那么我们直接关闭 NetworkManger 服务即可。

systemctl stop  NetworkManagersystemctl disable NetworkManagerchkconfig NetworkManager off