How can I solve the issue if restarting the network card in Linux fails?

If the network card fails to restart on Linux, you can try the following solution:

1. Check network connection: Make sure the Ethernet cable is properly connected and that the router or switch is working correctly.
2. Verify the network card driver: Ensure that the network card driver being used is installed correctly and compatible with the Linux kernel version.
3. Restart network services: Execute the following command in the terminal to restart network services:
4. Restart the networking service by using the following command: sudo service networking restart.
5. Restarting the computer: Try restarting the computer, as this can sometimes resolve certain network issues.
6. Check the network configuration file: review and verify that the settings in the network configuration file (such as /etc/network/interfaces) are correct and match the network environment.
7. Clear cache: execute the following command to clear the network cache and restart the network service.
8. Stop the network manager service, delete the NetworkManager state file, and then start the network manager service.
9. Update system and drivers: Make sure that the system and network card drivers are up to date by using the package manager to update system software and drivers.
10. Try reinstalling the network card driver: If all of the methods above have failed, you can attempt to uninstall and reinstall the network card driver.

If none of the above methods work, further examination of system logs or seeking professional technical support may be necessary to resolve the issue.