Installing linux/119/en
From Gender and Tech Resources
The bootloader is the first program started by the BIOS. This program loads the linux kernel into memory and then executes it. It often offers a menu that allows the user to choose the kernel to load and/or the operating system to boot.
If you are installing via USB, best not to automatically install GRUB, but to choose No and set it manually. That list of disks and device files when partitioning.