C7重啓網卡報Job for network.service failed because...錯誤

[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]: 正在打開環回接口： [ 肯定 ]
10月 26 17:15:57 mina0 NetworkManager[679]: <info> [1509009357.3386] audit: op="connec
10月 26 17:15:57 mina0 network[3308]: 正在打開接口 ens33： 錯誤：激活鏈接失敗：No suita
10月 26 17:15:57 mina0 network[3308]: [失敗]
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.

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解決：

[root@mina0 hadoop]# systemctl stop NetworkManager
[root@mina0 hadoop]# systemctl disable NetworkManager

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而後：重啓網卡便可：
[root@mina0 hadoop]# systemctl restart network
[root@mina0 hadoop]# ifconfig