Updating kernel with yum
If you don’t like the command–line way, you could easily upgrade your Linux Kernel in Ubuntu and its derivatives using Ubuntu Kernel Upgrade Utility. Your system will reload the new kernel on the fly and activate it.
Then, remove the newly installed Kernel using command: The following steps are tested in Ubuntu 17.04 server.There will be a service restart of every running service as the new kernel is loaded, but you skip the entire bootloader & hardware initialization. Thanks for promoting kexec (which is nothing new and is able to do what you have described for more than 7 years) but please update your article/video: Using kexec has nothing to do with “patching” a kernel. You are just restarting the OS (not the whole system! your are avoiding your system’s firmware (BIOS, now EFI) initializing including PXE boot, HW RAID, or other peripheral devices.By using kexec you can upgrade your running Linux machine's kernel without a reboot. But you have to shutdown all running processes and services, unmount file systems, will lose network connectivity…The following steps are tested in Cent OS 7 64-bit minimal edition.