Ubuntu – GNU GRUB Version 2.02~ beta 2-9 (booting from USB)

bootdual-bootgrub2

I attempted to install the latest version of Ubuntu, on my laptop which had Windows 7 on it: the installation procedure went fine, it was right at the end when update-grub collapsed.

Now it's stuck with this message:

GNU GRUB Version 2.02~ beta 2-9

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>_

None of the options in the boot menu are successfull.

Best Answer

You will not be able to fix anything from that prompt (it is high-level kung-fu).
You need to boot again from installation medium and do a procedure called "grub repair". A lot of tutorials on the net, for example this one. If it fails again, ask another question with details on what you do and what errors you see.

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Ubuntu – How to boot USB from GNU GRUB 2.02~beta2-9ubuntu1

This is a deep revive but since there is no answer, I may as well do it.

In GNU GRUB command line (hit c on menu) and type ls -lh in the shell and look for the hard drive that matches your USB by size...it should tell you that it found a partition on the USB. Then do:

set root='hd[something],[some partition]'
chainloader +1
boot

It should then proceed to boot from your USB stick partition.

Ubuntu – GNU GRUB Version 2.02 beta 2-9 while booting from USB

I'll refer to that prompt as a 'grub rescue' crash. You can use the grub commands with steps provided in this answer: https://unix.stackexchange.com/a/148042/81664

I have used those steps in the past and it works. However, I usually use a different set of steps that also works. The steps below that I'm using involves updating grub and reinstalling grub.

The reinstalling will incidentally repair and problem glitches in the original install that is causing the crash. The update with find all installed OSes and add them to the boot menu.

You can most likely remedy this by manually installing grub on your desired HD.

Boot to a live try Ubuntu session, then run the following at a terminal prompt:

a) sudo mount /dev/sdaX /mnt # Make "sdaX" the partition that has Ubuntu install (i.e. /dev/sda2)
b) for i in /sys /proc /run /dev; do sudo mount --bind "$i" "/mnt/$i"; done
c) sudo chroot /mnt
d) update-grub
e) if no errors skip this "e" section
     grub-install /dev/sdX (sdX is the hard drive that has linux installed (i.e. /dev/sda)
     update-grub 5) Reboot the system

After you have performed the manual steps be sure to set your computer bios to have your desired boot drive as the default boot device.

Best Answer

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Ubuntu – How to boot USB from GNU GRUB 2.02~beta2-9ubuntu1

Ubuntu – GNU GRUB Version 2.02 beta 2-9 while booting from USB

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