I can't get my Ubuntu installation to boot up. As an alternative, is it possible to install GRUB2 on a USB device, then boot up using that, then unplug the USB device once Ubuntu is running? So I'm not wanting to install Ubuntu on the USB drive, or use a Live USB ISO, but instead just use the USB to facilitate booting.
Update: This is an Ubuntu 20:10 installation, the laptop is a core i3 m370, 2 core, 4gb ram
Update: things attempted to get system to boot:
Installed from iso dvd Reinstalled from iso
Swapped harddrive for new harddrive, and reinstalled
Ran fsck from live dvd
Installed boot-repair, it tells me to disable bios compatibility in my firmware, enable efi and try again. This is an old laptop and had no efi bios options.