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I have a UEFI netbook with an installed Lubuntu 20.04 where I can't install grub on the hard disk (strange problem with the UEFI/BIOS system). But I can launch it with supergrub2. It finds the hd partition and launches it. Now I would like to create a bootable usb stick (the netbook looks for a usb stick by default) which contains the EFI partition and grub which then starts the ubuntu on the hard disk. How can I do that? Thanks!

user870424
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2 Answers2

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thanks for your ideas. I think starting from usb doesn't work as well because of UEFI/BIOS bugs. But I found a solution:

  1. get Ubuntu 20.04 mini.iso (see post 'Installing GRUB onto a USB stick (Server 20.04)'
  2. burn iso to a usb stick
  3. append the menu entry found in /boot/grub/grub.cfg on my hdd to the one on the usb stick (I had to change hdb2 to hda2 and hd1 to hd0 for some reason).
user870424
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You can try the following method:

  • Put an installed Ubuntu system into a USB drive (size >= 16 GB) by extracting/cloning from a compressed image file. Use the method described in the following link,

    If you need not encrypt the drive, there is an easy alternative

  • Boot into the Ubuntu system in a USB drive.

  • Run the following command line (in a terminal window)

    sudo update-grub

  • Reboot

If there is a good Ubuntu system in the internal drive, it should be recognized by update-grub, and a grub menuentry should be created, so that you can boot into the Ubuntu system in the internal drive.

sudodus
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