This is a very new terminology for Windows users, but it is not at all a new terminology in computer field. A “Kernel” is the core programming of operating system. Which ever operating system you are using, you are definitely using one of the “Kernel”.
In Windows, the updates include updates for Kernels also along with software updates, and we cannot uninstall Kernel updates if something goes wrong in the operating system, but in Linux, Kernels are shown and updated different from other softwares, and can be installed or uninstalled individually if something goes wrong in the operating system.
If you are facing any kind of system issues like :
1. No Wifi or ethernet
2. No video acceleration
3. Black Screen on startup
4. Random System Freeze
5. or any other unexpected issues, it is the faulty latest kernal which you have installed.
To see which Kernel is in use, just go to “Update Manager >> View >> Linux Kernels”. The Kernel which shows ‘Active’ in front of it is the recently loaded Kernel.
To remove the faulty Kernel, follow the below mentioned steps :
1. Reboot the system
2. Press and hold the shift key to show the boot menu or the GRUB menu (Menu which shows the list of operating system installed in your hardware).
3. In the boot menu, select the line which states ‘Advanced options’.
4. Select an older kernel with out the ‘Advanced options’
5. After the computer boots with older Kernel, just go to the update manager again and uninstall the newer Kernel.
Once the newer Kernel is uninstalled, do manual update whenever an update is performed and do not select the Kernel which created the problem.
You can also schedule updates as per your wish, just go to “Update manager >> Edit >> Preferences >> (now you can change the schedules in the Auto Refresh option)”
Hope this article will clear up your understanding about Linux Kernels.