I am trying to boot my own simple OS kernel using GRUB stage2_eltorito. However, the compiled ISO simply leads to a GRUB prompt. I looked up online, and I saw I need to load my kernel. However, when I try to load my kernel, it says I need to load a hard disk first, using the root command. How do I load my ISO file's partition to load my kernel? Thanks in advance!

2 Answers 2


There is your howto:


or here:


In short:

grub> set pager=1
grub> ls
(hd0) (hd0,msdos2) (hd0,msdos1)
grub> ls (hd0,1)/
lost+found/ bin/ boot/ cdrom/ dev/ etc/ home/  lib/
lib64/ media/ mnt/ opt/ proc/ root/ run/ sbin/ 
srv/ sys/ tmp/ usr/ var/ vmlinuz vmlinuz.old 
initrd.img initrd.img.old

This is just example, you have to modify it to your situation. You have examples in linked howtos.

  • Thank you!! ls (hd0, gptX), where X is partition number, worked for me and I finally found out where my OS was located
    – testing_22
    Oct 22, 2021 at 19:25

The grub ls -l command will show all devices and partitions with their UUID-s.

thanks to

  • 1
    ls -l is not valid because -l is not a valid option for ls. You will get the error error: file '-l' not found
    – shrewmouse
    May 21, 2020 at 16:14
  • @shrewmouse Please check the version of GRUB you are using, I believe this applies to version 2 only.
    – gregn3
    May 21, 2020 at 16:20
  • It's grub2 and the documentation that you link to doesn't even have the a -l option.
    – shrewmouse
    May 21, 2020 at 16:39
  • It works when in the GRUB command prompt, before booting the OS. I have just checked, I have GRUB version 2.04.
    – gregn3
    May 21, 2020 at 17:03
  • 1
    ls -l worked for me. Ubuntu MATE 21.04. May 25, 2021 at 3:57

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.