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Linux boot process

Source: Internet
Author: User
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1.Linux Start-Up process analysis

(1) BIOS self-Test

L Hardware Detection and initialization

L Boot boot device

(2) Boot boot device

L floppy disk (first sector of 0 tracks)

L discs (most peripheral storage tracks)

L Hard Drive (MBR)

L USB Storage Device

(3) Call the Linux boot program into memory

L Linux Boot program can use Grub/lilo and other boot software

L Grub/lilo can be installed in the boot sector of the mbr/boot partition

(4) running the Linux kernel

L kernel in/boot directory, Linux system can support multi-version kernel simultaneously

L UNZIP the kernel

L Detection Hardware

L Load Root file system

(5) Executing the INIT process

L Start a new process or close a process

L Select startup mode

L Establish virtual terminal

(6) User Login

L Enter user name and password

L Load User Profiles

L Load Shell Program

Linux boot process

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