由于我的虚拟机是从别的机器拷贝过来的，导入新机器后，没有问题，第二天就网络连接不上了，就出现下面的错误
[root@centos ~]# /etc/init.d/network restartRestarting network (via systemctl): ?Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details. ??????????????????????????????????????????????????????????[FAILED][root@centos ~]# 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 Tue 2018-03-20 06:32:23 EDT; 23s ago ????Docs: man:systemd-sysv-generator(8) ?Process: 20428 ExecStop=/etc/rc.d/init.d/network stop (code=exited, status=0/SUCCESS) ?Process: 20597 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)Mar 20 06:32:22 centos systemd[1]: Starting LSB: Bring up/down networking...Mar 20 06:32:22 centos network[20597]: Bringing up loopback interface: ?[ ?OK ?]Mar 20 06:32:22 centos network[20597]: Bringing up interface eth0: ?Error: ...n.Mar 20 06:32:22 centos network[20597]: [FAILED]Mar 20 06:32:23 centos network[20597]: Bringing up interface eth1: ?Connect...9)Mar 20 06:32:23 centos network[20597]: [ ?OK ?]Mar 20 06:32:23 centos systemd[1]: network.service: control process exited,...=1Mar 20 06:32:23 centos systemd[1]: Failed to start LSB: Bring up/down netwo...g.Mar 20 06:32:23 centos systemd[1]: Unit network.service entered failed state.Mar 20 06:32:23 centos systemd[1]: network.service failed.Hint: Some lines were ellipsized, use -l to show in full.
百度了一大堆，都说是拷过来的时候mac地址的问题。
下面就提供了我解决问题的方法：
#关闭系统自带的NetworkManager这个管理套件就可以解决。[root@centos ~]# systemctl stop NetworkManager[root@centos ~]# systemctl disable NetworkManagerRemoved symlink /etc/systemd/system/multi-user.target.wants/NetworkManager.service.Removed symlink /etc/systemd/system/dbus-org.freedesktop.NetworkManager.service.Removed symlink /etc/systemd/system/dbus-org.freedesktop.nm-dispatcher.service.[root@centos ~]# #重启网络[root@centos ~]# /etc/init.d/network restartRestarting network (via systemctl): ???????????????????????[ ?OK ?]
Failed to start LSB: Bring up/down networking.
原文地址：https://www.cnblogs.com/dadonggg/p/8611483.html