复制centos 后不能上网,处理办法
CentOS7 Failed to start LSB: Bring up/down解决方法
https://blog.51cto.com/addam/1839518
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。
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