Building and compiling Linux Kernel :

What is Linux Kernel ?

• As we know Kernel is the core of any operating system which is the interface between computer's hardware and it's processes .
• And the main task of the kernel is :

1. Memory management
2. Process management
3. System calls
4. Device drivers
5. Security

• Linux Kernel is a free opensource monolithic, modular and multitasking Kernel for Unix like operating systems .

• Though it is opensource we can install and manipulate as per our need .

Dependencies :

• Make sure to install these dependencies :

sudo apt-get install libncurses-dev flex bison openssl libssl-dev dkms libelf-dev libudev-dev libpci-dev libiberty-dev autoconf

How to installation :

• Navigate to kernel.org and download the latest version .
• Here I am using Ubuntu as the operating system .
• Install it with wget .

$sudo wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.9.tar.xz

• Unzip the downloaded file .

$ sudo tar -xvf linux-5.10.9.tar.xz

• Make a directory in your home folder .

$ mkdir kernel

• Copy the file after extraction .

$ cp -r linux-5.10.9/ /kernel

• Navigate to :

$cd kernel/linux-5.10.9/

• Start the Linux source configuration tool

make menuconfig

• Edit the configuration of kernel and save-and-exit.
  

• Compile the kernel .
  

$make -j 5 KDEB_PKGVERSION=1.0 deb-pkg

• Install the Kernel .

sudo dpkg -i ../linux*.deb

• Reboot your system and check for the kernel version .

Thank You 🤖🤖🤖