1. Boot Process
Mark Stanovich
COP 5641 / CIS 4930

2. Booting Components
BIOS
Bootloader
Kernel
Init

3. Partition Information
BIOS
Initialize the hardware
Load the bootstrap code
Bootstrap Code
Partition Information
Bootstrap Code
Root Partition(s)
sector

4. Bootloader Load the kernel E.g., Grub Image Initramfs
Kernel command line parameters
E.g., Grub
Kernel Image
Initramfs

5. Kernel Initialize subsystems Start init process Data structures
Hardware
Memory management units
Processors
Start init process

6. Init Start services Device Manager (e.g., udev) Network Window manager
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7. Things for you to do
Assignment 1
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