Boot Process
5 stages
BIOS / UEFI
BIOS CHIP - Basic Input/Output System, this is what is booted first before the actual OS
Main job is to get key components to work - CPU (receive instructions)/ RAM (store and retain data)
Find which hard drive to boot from
UEFI
Needs small FAT32 partition data to tell it where the OS is
MBR / GPT
MBR - Partition tables are usually right at the first sector
Boot Loader (GRUB2)
GRUB2
Initrd / Kernel
systemd