禁用和删除“NetworkManager”服务后，我无法启动 CentOS 7“网络”服务。当我检查网络服务状态时，出现以下错误：
#systemctl status network.service
network.service - LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network)
Active: failed (Result: exit-code) since Fri 2015-01-16 22:30:46 GMT; 38s ago
Process: 4857 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
Jan 16 22:30:46 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jan 16 22:30:46 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jan 16 22:30:46 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jan 16 22:30:46 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jan 16 22:30:46 localhost.localdomain network[4857]: RTNETLINK answers: File exists
Jan 16 22:30:46 …