Live patching allows you to update Linux kernel without rebooting your system. This approach is definitely a perfect solution for huge enterprises with interruption-sensitive services when pauses can cause toxic effects to the whole business. But kernel update is a must in today’s world full of vulnerabilities, security issues and gaps. Only a forehanded kernel update can guarantee trouble-free smooth operation of your business.
You might have already read our live kernel patching tutorials: Live patching Debian 10 Linux kernel with Kpatch and Live patching Ubuntu 20.04 LTS Focal Fossa Linux kernel with Kpatch. And if not, consider them as useful materials to share with your colleagues and friends.
In this tutorial, I’ll show you how to patch Oracle Enterprise Linux 7 - UEK4 Linux kernel using Kpatch without rebooting it.