Requirements :-

GNU/Linux :- Any distribution
Assembler :- GNU Assembler(gas)
GCC :- GNU Compiler Collection, C compiler. I'm using gcc 4, 5, 6, 7, 8 versions
Xorriso :- A package that creates, loads, manipulates ISO 9660 filesystem images.(man xorriso)
grub-mkrescue :- Make a GRUB rescue image, this package internally calls the xorriso functionality to build an iso image.
QEMU :- Quick EMUlator to boot our kernel in virtual machine without rebooting the main system.

Usage :-

Run the script(run.sh)

sh run.sh

or

chmod +x run.sh
./run.sh

To Run kernel in VirtualBox :

1. Click on New
   
2. Enter Name, Type: Other, Version: Other/Unknown
   
3. Memory size : keep it as it is
   
4. Click next until File location and size dialog, select 64.00 MB size
   
5. Click create
   
6. Goto Settings -> System -> Acceleration and disable Enable VT-x/AMD-V or any other graphics card support
   
7. Goto Settings -> Storage select ISO image of kernel.
   
8. Click OK and Start machine
   

References :-

https://www.codeproject.com/Articles/1225196/Create-Your-Own-Kernel-In-C

https://www.c-sharpcorner.com/article/create-your-own-kernel/