How to Install Kernel 5.15 From Source on Ubuntu 21.10

GNU/Linux Ubuntu 21.10 Building Kernel 5.15 from Source Code Guide

Hi! This tutorial will guide you step-by-step on How to Build and Install a New Custom Kernel 5.15 from Source Code in Ubuntu 21.10 Impish GNU/Linux.

And this Ubuntu 21.10 Kernel 5.15 Setup make use of the latest Source Code.

Especially relevant: on Ubuntu Desktop you may instead see the Easier Kernel Update by the Mainline Kernel Installation GUI.

Again this tutorial make it the Easy Way and so is intended especially for Beginners.

Possibly, a very good Alternative for Desktops is represented by the ready-made XanMod and Liquorix Kernel Setup.

Important to know how this Setup does Not change your existing System and so in any case you will be able to startup with the current Kernel from the GRUB Splash Screen.

For further advanced Kernel Configuration instructions you may see the Linux Kernel Documentation.

Finally, for a Non Bootable System before see: How to Chroot on Ubuntu GNU/Linux Tutorial.

1. 1. Installing Dependencies

   Open a Terminal Shell emulator window
   (Press “Enter” to Execute Commands)

   
   First, possibly Upgrade your Ubuntu System with:

   sudo apt update && sudo apt upgrade

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

   How to QuickStart with Command Line on Ubuntu GNU/Linux

   Bash Shell Ubuntu QuickStart Guide

   Getting-Started with Command Line on Ubuntu Linux
   Reboot:

   sudo reboot

   And then play:

   sudo apt install build-essential libncurses5-dev fakeroot xz-utils libelf-dev bison flex dwarves

2. 2. Making Target Directory

   Now make the Target Folder
   With:

   mkdir ~/kernel