The Linux boot process, a chart

The Linux boot process, a branching chart. For the most part, the levels do not depend on column. LILO does not require EFI, nor does GRUB require BIOS. EFI and BIOS support are now included in both bootloaders. Yes, there is some simplification here. EFI is very featured, but hasn't been commonly exercised to its full extent. Eventually EFI could possibly replace GRUB/LILO, but that day hasn't