In this article you will learn what is Linux Kernel live patching, how it ensures the uptime, what 5 tools are available to help you run servers for years - without reboots and what are the advantages and drawbacks of each tool.
Live patching--applying security patches to a server while it’s running, no reboot necessary--offers valuable capabilities to organizations that manage multiple servers:
* Continual operation of servers, with no reboots. This means little or no downtime.
* Automation of patching-related tasks. This frees up support staff to do other work.
* Immediate application of new patches. This greatly reduces server vulnerabilities.
Covered in the article are: Oracle Ksplice, RedHat Kpatch, SUSE Kgraft, Ubuntu Livepatch, and KernelCare.
See
Run Linux Servers Without Reboots Using Kernel Live Patching Tools - OSTechNix#
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kernellivepatching 
This article explains what is Kernel live patching and 5 kernel live patching tools that will help to run Linux servers without reboots.
