booting is two or three stages, both of which will end up calling the final-stage bootloader code in the boot block of a partition.
Is that the reason why I need to reinstall GRUB2 when moving
/partition which contains
/boot(according to https://askubuntu.com/questions/299886/partitions-is-it-safe-to-move-partition-containing-boot and https://howtoubuntu.org/how-to-repair-restore-reinstall-grub-2-with-a-ubuntu-live-cd)?
some said booting is one stage, because all bootloader code is in a dedicated EFI boot partition. Is that true?
Does that mean I can move any partition (even if Lubuntu is installed on it), and still can boot, without having to do anything with bootloader?