Q:

Exact booting process of Ubuntu?

what is the exact booting process of Ubuntu ( Linux). I mean what files it will load and what status it will verify before start booting  & in the booting how it will move.
could some one explain ?
Thank you.

A:

Basically, the boot process goes through the BIOS > Master Boot Record (MBR) > GRUB > kernel > init > run level. These two articles explain briefly and in detail:

6 Stages of Linux Boot Process 
Inside the Linux Boot Process

