25

This is what I see:

GNU GRUB version 2.02~beta2-9ubuntu1

Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device or file completions.

grub> _

What should I do now?

10
  • 2
    The message means something wrong happened with the bootloader. Nothing else can be said or suggested unless more information is given. Ubuntu release/version? Is Ubuntu standalone or in dual boot with other OS? What happened exactly before the event, what were you doing, etc.?
    – user589808
    Feb 16, 2017 at 12:32
  • 3 days ago i bought a new dell laptop with ubuntu 14.04...it was working fine until yesterday...when starting this new laptop first time i take the dell recovery media (factory settings reset) in image file format in download folder...so today i want to restore to its factory settings...then it started the installation process and stucks in mid and asked me to reboot the system saying that installer has crashed...then i reboot it and i get this above problem... Feb 16, 2017 at 13:38
  • 1
    Please help me...what should i do now Feb 16, 2017 at 13:39
  • If it's a factory installed Ubuntu then you should contact Dell support directly.
    – user589808
    Feb 16, 2017 at 13:39
  • Ubuntu was standalone Feb 16, 2017 at 13:40

8 Answers 8

29

I copied from eli's answer in Unix forum

Cause: boot process can't find the root partition

Solution

Please type ls This will show all partitions, and then type individual

ls (hd0,1)/
ls (hd0,2)/ 

... and so on, until you find like

(hd0,1)/boot/grub or (hd0,1)/grub

In case of EFI,

(hd0,1)/efi/boot/grub or (hd0,1)/efi/grub... now set the boot parameters accordingly, just type this with your number

set prefix=(hd0,1)/grub
set root=(hd0,1)
insmod linux
insmod normal
normal

now it would boot and please open the Terminal and put this command line

sudo update-grub ... it should boot correctly in the next time. If not, you have to go through the steps again. In other case, you might have to repair or install grub again, please look at this article.

My SW: Windows 10 and Ubuntu 16.04 dual boot

HW: HP Pavilion 15t

7
  • 1
    This works for me, but does not work for subsequent boots (even after running sudo update-grub) Mar 19, 2020 at 15:33
  • 1
    @geoffn91, If not fix in the second booting, please consider Ubuntu solution at help.ubuntu.com/community/Boot-Repair
    – Cloud Cho
    Mar 19, 2020 at 17:27
  • 1
    instead of (hd0,1)/efi/boot/grub ; I see (hd0,1)/efi/boot/ with three things : bootx64.efi, fbx64.efi, mmx64.efi --- no grub dir
    – pyeR_biz
    Oct 1, 2021 at 6:43
  • 1
    @pyeR_biz, Thanks for sharing your case. Please try method at help.ubuntu.com/community/Boot-Repair.
    – Cloud Cho
    Oct 1, 2021 at 16:20
  • I executed above command. Am getting the error states. Can't find command sudo update-grub
    – Devang
    Nov 26, 2021 at 4:57
10

You got a problem with the bootloader. You should initialize kernel. First use command ls, then adjust the following commands according to it. In the place of hd0 write your disk and in 1 write your number.

grub> set root=(hd0,1)
grub> linux /vmlinuz-4.4.0-38-generic 
grub> initrd /initrd.img-4.4.0-38-generic
grub> boot

If you don't know what your version of the kernel is, write:

grub> linux /vmlTab
grub> initrd /inTab

FIRST try only grub> boot

1
  • linux /vml gives file '/vml' not found on KDE Neon 5.23. Oct 22, 2021 at 9:20
5

Not a permanent fix, but you should be able to continue just by exiting:

grub> exit

This will continue to either the grub menu (if you have a dual boot system) where you can choose which OS you want to boot, or directly to your primary operating system. This is a common problem with dual booting a system with UEFI bootloader.

1
  • 3
    In my case this brings me back to the terminal, and the 2nd exit boots to the primary OS. Feb 29, 2020 at 3:09
0

When trying to install ubuntu 20.04.2.0 on hp pavilion I got the same. Used ESC + F9 to launch BIOS boot menu, I found both windows and Ubuntu. Both worked fine.

0

I ran into this issue today, I have Linux installed alongside windows and I wanted to remove ubuntu and I directly deleted the partition from windows from disk management on windows 10 without actually deleting the grub menu. As a result whenever I rebooted the system I would see that black screen with that the grub terminal.This basicall happens when the system couldn’t find a OS to boot from so it would go into that grub terminal. so what you need to do is modify your boot order.

  • boot your system by entering the command “reboot”.
  • keep pressing F2 inorder to go into bios, This key varies based on the make of your device in my case I was using a Lenovo ideapad so it would work.
  • Once you have the bios menu using the arrow keys go to “boot” section then you need to change the boot order under “EFI” by pressing f5,f6 keys in my case I deleted the ubuntu partition so I moved the windows to top.

enter image description here

  • after you change the boot order press f10 to save and exit and your system will boot into your desired OS (windows in my case).

Originally posted here: https://qr.ae/pGDLeh

-1

FYI, for anyone stumbling upon this post now - I got stuck in grub >, and grub > ls wasn't producing anything.

grub > boot produced:

error: you need to load kernel first

Unplugging the USB mouse and restarting fixed it.

-1

For Ubuntu 21.04, after a boot repair from usb, I got

grub> insmod all_video
grub> insmod linux
grub> linux /boot/vmlinuz root=/dev/sda2
grub> initrd /boot/initrd.img
grub> boot

And. . . Booted!!!

1
  • file '/boot/vmlinuz' not found Oct 22, 2021 at 9:21
-3
grub> ls

Get the data members

grub> ls (hd0,gpt2)/
grub> ls (hd0,gpt2)/boot
grub> set root=(hd0,gpt2)
linux /boot/vmlinuz-4.15.0-20
1
  • 5
    In case the questioner is not as familiar with command line operations as you are, perhaps you could add a few words of explanation as to what these commands do and why you suggest doing them. Jul 30, 2019 at 13:44

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