How to solve the issue of network card not available when upgrading the kernel in CentOS.
If the network card is not available during the process of upgrading CentOS, it may be due to incompatibility with the new kernel or missing drivers. Here are some possible solutions:
- Revert to an old kernel version: Select the old kernel version at startup and use this version for recovery. You can list all available kernels using the following command:
- List all installed kernel packages.
- Next, use the following command to install an older version of the kernel:
- install kernel-
using yum - After restarting the computer, select the old kernel version to boot up.
- Check if the drivers exist: If you find that some drivers are missing during the upgrade process, you can try to manually install these drivers. You can view available drivers with the following command:
- Show device information for all network devices using the command lspci -nnk.
- Install or upgrade using the drivers provided by the device manufacturer.
- Update drivers: If you have confirmed that your network card driver is installed and compatible with the new kernel version but still cannot be used, you can try updating the driver. You can use the following command to update all the installed packages:
- update the yum package manager
- If new drivers are available, they will be automatically downloaded and installed.
- Check hardware compatibility: If the above methods are ineffective, it may be because your network card is not compatible with the new kernel version. In this case, you may need to replace the network card for compatibility.
Please note that these solutions may vary depending on individual circumstances, and you may need to make adjustments according to your own situation. Also, upgrading operations may cause other issues, so it is recommended to back up important data before upgrading the system and proceed with caution during the upgrade.
