Linux Boot Process- How it executes

run_levelLinux Boot Process 

Basically “Boot Process A CPU gets its instructions from memory. The CPU reads instruction from the BIOS and searches for the hard disks, CD drives and other hardware. The BIOS program looks at the first sector for boot code.

The boot process for Linux goes through several stages. Different systems follows different stage here in Linux  have 6 stages of Boot.

 

  • BIOS   ( Basic Input/Output System )   Boot
  • MBR    ( Master boot Record )
  • GRUB  ( Grand Unified Boot Loader )
  • Kernel
  • init
  • run level init 0 – init 6 )

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