How to upgrade Kernel On Red Hat Enterprise Linux 7/8 and CentOS 7/8 Linux
The Linux kernel is the foundation on which all Linux distributions operate. It is open-source software.You can decompile, examine, and modify the code.
Updated versions of the kernel can improve security, add latest functionality, and improve the speed at which the operating system functions.
Prerequisites
A Red Hat Enterprise Linux Server or
CentOS Linux server
A Red Hat Enterprise Linux Sever must have valid RedHat Registration and Subscription
Access to the command-line / terminal access
Sudo (Root/Super User) privileges
A recent backup of your system
Good Internet connection on System