Linux › Section E · How the Linux kernel boots › Topic E.3
Boot loaders and GRUB
Before the kernel can run, something has to find it on disk, load it into memory and hand it its parameters. On most Linux PCs that something is GRUB. Knowing its menu, its command line and how its configuration is generated lets you rescue a machine that will not boot.
In this topic
- The boot loader's puzzle
- What boot loaders do, and which exist
- Reaching the GRUB menu
- Inside a menu entry
- Two different roots
- Worked example: booting by hand
- How the configuration is generated
- Worked example: always show the menu
- Distribution differences and installing
- Common mistakes to avoid
- Key takeaways
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