Centos7 network card error (ifcfg-Wired_connection_1)
In the centos7 system, we checked the network configuration information and found the following strange phenomena:
Check the network card IP information:
[root@linserver01 network-scripts]# ifconfig
View network card configuration file
[root@linserver01 network-scripts]# ls
As you can see, there is eth0 network card information, but there is no corresponding ifcfg-eth0 configuration file, instead there is a very strange configuration file, ifcfg-Wired_connection_1.
View the content of the configuration file, which is consistent with the information of eth0:
Then we edit the configuration file and restart the network service:
[root@linserver01 network-scripts]# systemctl restart network
However, the configuration does not take effect. The reason
is that there are currently two network management tools, NetworkManager and network, on CentOS.
If both configurations are configured, it will cause conflicts, and NetworkManager will clean up the routes when the network is disconnected. If some custom routes are not added to the NetworkManager configuration file, the routes will be cleaned up and need to be customized after the network is connected. Add it up.
Therefore, we need to restart the NetworkManager.service service:
[root@linserver01 network-scripts]# systemctl restart NetworkManager.service
Check service status:
[root@linserver01 network-scripts]# systemctl status NetworkManager.service
After restarting the service, the modified configuration of the network card will take effect, or restart the system.
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