Step-by-step – Build Kernel Ubuntu 20.04 Guide

GNU/Linux Ubuntu 20.04 Build New Kernel from Source Code Guide

Hi! This tutorial will guide you step-by-step on How to Build and Install a New Custom Kernel from Source Code in Ubuntu 20.04 Focal LTS GNU/Linux Desktop.

And this Ubuntu 20.04 Kernel Setup make use of the latest Source Code.

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.

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

Finally, this guide includes detailed instructions about to Updating Linux Firmware on Ubuntu.

1. 1. Installing Dependencies

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

   
   First, Upgrade 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