[root@mina0 hadoop]# systemctl restart network
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
[root@mina0 hadoop]# journalctl -xe
10月 26 17:15:57 mina0 network[3308]: 正在打开环回接口： [ 确定 ]
10月 26 17:15:57 mina0 NetworkManager[679]: <info> [1509009357.3386] audit: op="connec
10月 26 17:15:57 mina0 network[3308]: 正在打开接口 ens33： 错误：激活连接失败：No suita
10月 26 17:15:57 mina0 network[3308]: [失败]
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 network[3308]: RTNETLINK answers: File exists
10月 26 17:15:57 mina0 polkitd[680]: Unregistered Authentication Agent for unix-process
10月 26 17:15:57 mina0 systemd[1]: network.service: control process exited, code=exited
10月 26 17:15:57 mina0 systemd[1]: Failed to start LSB: Bring up/down networking.
-- Subject: Unit network.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit network.service has failed.
--
-- The result is failed.
10月 26 17:15:57 mina0 systemd[1]: Unit network.service entered failed state.
10月 26 17:15:57 mina0 systemd[1]: network.service failed.
########################
解决：
[root@mina0 hadoop]# systemctl stop NetworkManager
[root@mina0 hadoop]# systemctl disable NetworkManager
##############
然后：重启网卡即可：
[root@mina0 hadoop]# systemctl restart network
[root@mina0 hadoop]# ifconfig
C7重启网卡报Job for network.service failed because...错误
原文：http://blog.51cto.com/11434174/2128759
