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?
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
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
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.
I did try some of the procedures suggested above to not avail.I don't believe anyone suggested a simple boot fix tool available out there already so here it is:
https://help.ubuntu.com/community/Boot-Repair or just search on the Ubuntu help site for boot repair tool.
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!!!
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.
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.
Originally posted here: https://qr.ae/pGDLeh
I got into this state by installing ubuntu onto an external USB SSD enclosure. The installer had modified the file in /boot/efi/EFI/ubuntu/grub.cfg to point to the new drive. When I removed the USB enclusure, the machine dropped me to the grub> prompt.
Based on the answers here: I was able to boot the old drive from the grub> prompt by running:
set prefix=(hd0,gpt1)/boot/grub
set root=(hd0,gpt1)/boot
insmod normal
normal
You'll need to select the right prefix/root for your machine (use tab to autocomplete).
I then modified the search.fs_uuid line in /boot/efi/EFI/ubuntu/grub.cfg to point to the old drive, and it booted as it did before.
search.fs_uuid 2cbadaa8-abad-4991-b99d-bbadbad99dbe root
set prefix=($root)'/boot/grub'
configfile $prefix/grub.cfg
I replaced the uuid by a uuid based on the output of:
lsblk -o NAME,SIZE,MOUNTPOINT,UUID
Regarding "and so on, until you find like (hd0,1)/boot/grub or (hd0,1)/grub". The situation can be different as you can see in the figure.
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.
