As I boot my computer , I always have to type the following to go inside the login display of the os.

set root=(hd1,gpt2);

set prefix=(hd1,gpt2)/boot/grub;

insmod normal;


I want to set the configuration(s) as default to avoid typing the above codes again and again.

I use the debian-based operating system and found the article of the solution which exactly tackles my current problem.

Brief solution which I quote is as below.

sudo update-grub;

sudo grub-install /dev/sda;

The results which were obtained typing the above 2 commands are as below.

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Seemingly no such error was found but as I reboot, the same GRUB menu appears even I've done the 2 commands...

This solution and this solution failed.

What can I do for next?

I've done the below 4 commands and got the below results .

efibootmgr -v;

tree -a /boot/efi;


sudo tree -a /boot/efi;

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  • Is /dev/sdb a USB drive? Does it boot and lead you to the same problem if you unplug drive first? If it does, perhaps try to sudo mv /boot/efi/ubuntu/grubx64.efi{,.bak} and then see if grub-install will actually install grubx64.efi back in /boot/efi/ubuntu/. If it does, see if sudo mv /boot/efi/kali/grubx64.efi{,.kali}; sudo cp /boot/efi/ubuntu/grubx64.efi /boot/efi/kali/ helps (in case shim failed somehow and the UEFI turns to the kali entry/executable). Maybe also pastebin /boot/efi/ububtu/grub.cfg and /boot/grub/grub.cfg.
    – Tom Yan
    Jun 28, 2021 at 8:03
  • If grub-install does not put another grubx64.efi back to /boot/efi/ubuntu/, make sure you rename the old one back with sudo mv /boot/efi/ubuntu/grubx64.efi{.bak,} before you perform a reboot.
    – Tom Yan
    Jun 28, 2021 at 8:08
  • I guess /dev/sdb is a usb and the format of it is fat32 . Jun 28, 2021 at 8:33
  • Even unplugged the usb , I encountered the same problem. Jun 28, 2021 at 8:33
  • I've done sudo mv /boot/efi/EFI/ubuntu/grubx64.efi{,.bak} instead of sudo mv /boot/efi/ubuntu/grubx64.efi{,.bak} . Jun 28, 2021 at 9:22

1 Answer 1


STEP1: Take the archive of the contents of the os.

STEP2 : Install the server version of ubuntu into the ssd(which means the original os will be deleted).

STEP3 : Reinstall the os which you really want to reinstall .

STEP4 : Solved!

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