CentOS7 Failed to start LSB: Bring up/down解决方法

ゝ一纸荒年。 2021-09-20 01:50 248阅读 0赞

刚刚装好的虚拟机突然不能上网了，报错很诡异，具体报错如下：  
/etc/init.d/network restart  
Restarting 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.  
\[失败\]  
使用systemctl status network.service命令查看结果如下：  
network.service - LSB: Bring up/down networking  
Loaded: loaded (/etc/rc.d/init.d/network)  
Active: failed (Result: exit-code) since 三 2016-08-17 11:34:36 CST; 54s ago  
Docs: man:systemd-sysv-generator(8)  
Process: 3847 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)  
8月 17 11:34:36 python.cn network\[3847\]: RTNETLINK answers: File exists  
8月 17 11:34:36 python.cn network\[3847\]: RTNETLINK answers: File exists  
8月 17 11:34:36 python.cn network\[3847\]: RTNETLINK answers: File exists  
8月 17 11:34:36 python.cn network\[3847\]: RTNETLINK answers: File exists  
8月 17 11:34:36 python.cn network\[3847\]: RTNETLINK answers: File exists  
8月 17 11:34:36 python.cn network\[3847\]: RTNETLINK answers: File exists  
8月 17 11:34:36 python.cn systemd\[1\]: network.service: control process exited, code=exited status=1  
8月 17 11:34:36 python.cn systemd\[1\]: Failed to start LSB: Bring up/down networking.  
8月 17 11:34:36 python.cn systemd\[1\]: Unit network.service entered failed state.  
8月 17 11:34:36 python.cn systemd\[1\]: network.service failed.  
查看系统日志，报错如下：  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python network: RTNETLINK answers: File exists  
Aug 17 11:34:36 python systemd: network.service: control process exited, code=exited status=1  
Aug 17 11:34:36 python systemd: Failed to start LSB: Bring up/down networking.  
Aug 17 11:34:36 python systemd: Unit network.service entered failed state.  
Aug 17 11:34:36 python systemd: network.service failed.  
Aug 17 11:36:28 python systemd: Starting LSB: Bring up/down networking...  
Aug 17 11:36:29 python network: 正在打开环回接口： 无法载入文件 '/etc/sysconfig/network-scripts/ifcfg-lo'  
Aug 17 11:36:29 python network: 无法载入文件 '/etc/sysconfig/network-scripts/ifcfg-lo'  
Aug 17 11:36:29 python network: 无法载入文件 '/etc/sysconfig/network-scripts/ifcfg-lo'  
Aug 17 11:36:29 python network: 无法载入文件 '/etc/sysconfig/network-scripts/ifcfg-lo'  
Aug 17 11:36:29 python network: \[ 确定 \]  
Aug 17 11:36:29 python network: 正在打开接口 eno16777736： 错误：激活连接失败：No suitable device found for this connection.  
经查，确认/etc/sysconfig/network-scripts/ifcfg-lo文件是存在的。问题出现在哪里呢？无法，只好百度一下吧，百度出来的结果竟然基本一样。  
百度答案：  
mac地址不对，修改mac地址。  
也许有人确实是mac问题，但是莫名其妙怎么可能mac地址更改了，除非你添加新网卡或者克隆的虚拟机。  
我特么真笑了，天下百度文章一大抄啊。。。。。。。。  
没办法了，Google一下吧，偶然看到一个文章，大意是跟系统自带的NetworkManager这个管理套件有关系，关掉就可以解决。  
试一下：  
systemctl stop NetworkManager  
systemctl disable NetworkManager  
Removed 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.  
重新启动网络：  
systemctl start network.service  
ifconfig |grep eno  
eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500  
inet 192.168.1.192 netmask 255.255.255.0 broadcast 192.168.1.255  
inet6 fe80::20c:29ff:fe3d:b305 prefixlen 64 scopeid 0x20<link>  
ether 00:0c:29:3d:b3:05 txqueuelen 1000 (Ethernet)  
RX packets 2 bytes 120 (120.0 B)  
RX errors 0 dropped 0 overruns 0 frame 0  
TX packets 22 bytes 3551 (3.4 KiB)  
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0  
网络正常启动，访问正常。

转载于:https://blog.51cto.com/13626424/2086200