https://wiki.debian.org/UEFI#Booting_from_removable_media https://wiki.debian.org/UEFI#Force_grub-efi_installation_to_...
https://wiki.debian.org/UEFI#Booting_from_removable_media https://wiki.debian.org/UEFI#Force_grub-efi_installation_to_...