Doing this requires a bit of technical knowledge about filesystems, partitioning and disk labels. If you don't know what UUID is or how to check if your system uses BIOS or UEFI, go learn some more and come back.
Read THE WHOLE instruction first, understand what it does, then try it yourself, first in a VM (I recommend virt-manager). Really, read the whole thing first.
All that is written here, you do at your own risk. I do not take any responsibility for any data or hardware loss (if you somehow manage to damage your hardware...), or any security risks. This workes for me and I feel confident using this, but I am the author. Do your own research, see if it works for you and decide if you want to use it or not. I do not claim this is the best or perfect solution.