ubuntu failed to boot

Question

I have ubuntu installed on a USB flash drive and a grub bootloader that has automatically installed on my hard drive.

I installed grub on the /boot/efi partition on a pendrive (with grub-install /dev/sda3 command), but when I want to boot ubuntu by selecting the boot option ubuntu (USB) instead of ubuntu (SKHYNIX -...) which is my hard drive I get ubuntu failed to boot. error.

How can I run Ubuntu from USB? (So that I can run them on any computer)

score 0 · Accepted Answer · answered May 05 '21 at 08:19

0

Reinstall your Ubuntu on USB. In the installing procedures, there is a part to select which device to install bootloader.

Something like this.

This time make sure you install /boot/efi partition on your pendrive but not your hard drive.

answered May 05 '21 at 08:19

Chuck Liu

149

Should i choose /dev/sda (entire device) or /dev/sda3 (EFI type partition)? – Ryba May 05 '21 at 09:50
In both options it still installed on hard drive, even though I chose a different drive. – Ryba May 05 '21 at 10:53
Try to unplug your hard drive when installing ubuntu on your pendrive. – Chuck Liu May 06 '21 at 06:29
It worked, thanks! – Ryba May 09 '21 at 14:45

ubuntu failed to boot

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