October 7, 2020 Comments 0 Ubuntu Forums 61 Views

[ubuntu] Grub – Add windows

Because of the Ubuntu 20.04 update my system (dual boot with Windows 10, dual HD, amd64, UEFI) is a bit of a mess. For instance the boot loader thinks Ubuntu is the only flavor in town. I have been looking around and came up with the following change of the /etc/grub.d/40_custom file:

Code:

#!/bin/sh exec tail -n +3 $0 # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. menuentry "Windows 10 (loader)"{ insmod part_gpt search --no-floppy --set=root --fs-uuid 109C-D028 chainloader /EFI/Microsoft/Boot/bootmgfw.efi }

I tried to reboot but came up looking at a black screen, and no HD action. Clearly the wrong choice.

I also tried:

Code:

sudo update-grub sudo grub-install /dev/sdb1

That did not work out either. What options do I have?

Previous df command shows negative value in 'Used' column

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