systemctl restart network出现错误：
[root@aims-node2 ~]# systemctl status network
?.network.service - LSB: Bring up/down networking Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled) Active: failed (Result: exit-code) since Thu 2017-10-26 17:16:42 CST; 22min ago Docs: man:systemd-sysv-generator(8) Process: 9649 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE) Oct 26 17:16:42 aims-node2 network[9649]: RTNETLINK answers: File exists Oct 26 17:16:42 aims-node2 network[9649]: RTNETLINK answers: File exists Oct 26 17:16:42 aims-node2 network[9649]: RTNETLINK answers: File exists Oct 26 17:16:42 aims-node2 network[9649]: RTNETLINK answers: File exists Oct 26 17:16:42 aims-node2 network[9649]: RTNETLINK answers: File exists Oct 26 17:16:42 aims-node2 network[9649]: RTNETLINK answers: File exists Oct 26 17:16:42 aims-node2 systemd[1]: network.service: control process exited, code=exited status=1 Oct 26 17:16:42 aims-node2 systemd[1]: Failed to start LSB: Bring up/down networking. Oct 26 17:16:42 aims-node2 systemd[1]: Unit network.service entered failed state.Oct 26 17:16:42 aims-node2 systemd[1]: network.service failed.
解决：
systemctl stop NetworkManager
重启网卡
systemctl start network
