How to exit network card configuration in Linux.

You can use the following command to exit the network card configuration:

1. Use the command “ifconfig” to identify the name of the network card you want to exit configuration for.
2. Use the command “sudo ifconfig down” to disable the network card. For example, if you want to disable a network card named eth0, use the command “sudo ifconfig eth0 down”.
3. Enable the DHCP client by using the command sudo dhclient to obtain an IP address. For example, if the interface name you want to enable is eth0, use the command sudo dhclient eth0.
4. Enable the network card by using the command sudo ifconfig up. For example, if the network card name you want to enable is eth0, use the command sudo ifconfig eth0 up.

These commands will disable the specified network card and then re-enable it.