Chapter 5 Flashcards
GRUB
Grand Unified Boot Loader
has two versions GRUB legacy (with version numbers up to 0.97) and GRUB 2 with versions 1.9 and higher
GRUB Legacy can only work with BIOS based computers
GRUB 2 can work with BIOS and EFI based computers
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LILO
Linux Loader
an older Linux boot loader.
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Things that the boot loader does
1 It examines the partition table and locates the partition that’s marked as bootable
2 It locates an OS kernel, loads it, and executes it directly.
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GRUB global options
Default OS - which GRUB which OS to boot
Timeout - how long to wait (in seconds) for a user to input before booting into the default OS
Background Graphic - optional, allows you to point to the background image
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GRUB Legacy per image options
title
specifies the label to display when the boot loader runs
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GRUB Legacy per image options
root
specifies the location of the of the root’s partition
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GRUB Legacy per image options
Kernel
describes the location of the Linux kernel as well as any kernel options that are to be passed to it. Paths are relative to GRUB Legacy’s root partition
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GRUB Legacy per image options
initrd
Initial RAM Disk
holds minimal set of drivers, utilities, and configuration files that the kernel uses to mount its root filesystem before the kernel can fully access the hard disk
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GRUB Legacy per image options
rootnoverify
Non-Linux Root
used to specify a boot partition for OS’s for which GRUB Legacy can’t directly load a kernel, such as Windows
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GRUB Legacy per image options
chainloader
tells GRUB Legacy to pass control to another boot loader. Typically it’s passed as +1 option
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syslinux
BIOS based boot loader. It’s much smaller than the GRUBs. member of the ISOLINUX family
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rEFIt
boot manager popular on Intel-based Macs
