Operating systems notes
The Boot Process
From a cold power button to a login prompt, the whole handoff chain. Every section is a drawn page beside a clear written explanation, about 16 minutes in all.
- Chapter 5 of 37
- About 16 minutes
- 7 sections
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In this chapter
- From power button to login: the big picture
- Firmware: BIOS and UEFI
- The bootloader (GRUB)
- Loading the kernel & initramfs
- The first process: init / systemd (PID 1)
- Reaching user space & login
- Why engineers should care
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