Failed to start LSB: Bring up/down networking.

Centos 7 外接的USB网卡热拔插一下..结果悲剧了.. 连不上网了...

执行命令

systemctl restart NetworkManager

结果正常,但是不能上网,ping也不通, 但是能打开路由器 192.168.1.1

执行命令

systemctl restart network

出现错误:

Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.

查看错误信息

systemctl status network.service

显示结果

● 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 四 2020-09-10 08:39:43 CST; 6min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 7314 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)

9月 10 08:39:43 test network[7314]: RTNETLINK answers: File exists
9月 10 08:39:43 test network[7314]: RTNETLINK answers: File exists
9月 10 08:39:43 test network[7314]: RTNETLINK answers: File exists
9月 10 08:39:43 test network[7314]: RTNETLINK answers: File exists
9月 10 08:39:43 test network[7314]: RTNETLINK answers: File exists
9月 10 08:39:43 test network[7314]: RTNETLINK answers: File exists
9月 10 08:39:43 test systemd[1]: network.service: control process exited, code=exited status=1
9月 10 08:39:43 test systemd[1]: Failed to start LSB: Bring up/down networking.
9月 10 08:39:43 test systemd[1]: Unit network.service entered failed state.
9月 10 08:39:43 test systemd[1]: network.service failed.

关键错误信息

Failed to start LSB: Bring up/down networking.

百度,谷歌也都查询了没有啥结果
无非就是停用重启 NetworkManager 和 network 然而并没有什么卵用..

于是乎
使用终极大法第一式-- 返璞归真:删除所有网络配置.

cd /etc/sysconfig/network-scripts

rm -f ifcfg-*

终极大法第二式--起死回生:重启服务,实在不行,重启系统

systemctl restart network

systemctl restart NetworkManager

重新配置一下IP地址,好用了...

[注意] 删除之前备份一下,否则什么记录的wifi密码,各个环境的IP配置就都没了..

centos7的网卡驱动或者NetworkManager 一直都有问题.不同的机器状况不太一样. 没有仔细调查,但是知道重接大法---删除,重启..

例如掉线, 闪断等, 往往重启一下 NetworkManager 就好用了,如果还不行,将之前所有配置都删掉, 但是在图形界面中删除么有用, 必须通过命令删除.

最后编辑于：2020.09.10 09:21:57