GNU GRUB is responsible for boot sequence of NuOS. The GNU Grand Unified Bootloader (GNU GRUB) is a multiple bootstrap loader. The version used in this SO is GNU GRUB version 0.95.
The boot process in NuOS is with an ISO image that contains the following files:
| File | Description |
|---|---|
| /boot/ | Folder that contains boot files |
| /boot/grub/ | Folder that contains GRUB files |
| /boot/grub/menu.lst | Boot options |
| /boot/grub/stage2_eltorito | 2nd stage of GRUB with El Torito specifications |
| /boot/kernel | NuOS kernel |
| /boot.catalog | Booting file |
You can download the booteable iso and change the '/boot/kernel' for your kernel and you can edit the '/boot/grub/menu.lst' for customize the boot of your kernel.