Boot loaders

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Notes: This page is created to ease the transition from Grub to Grub2. (Discuss in Talk:Boot loaders#)

The boot loader is responsible for loading the kernel and initial ramdisk before initiating the boot process. You can use different kinds of bootloaders in Arch, such as GRUB(2), Syslinux, LILO or GRUB Legacy.

This page will only contain short introduction and most used configurations users will touch. For detailed information, please see corresponding pages of each boot loader.

Configuration

Configuration files

Different boot loader use different files for configuration. Here is a short list:

  • GRUB: /boot/grub/grub.cfg
  • GRUB Legacy: /boot/grub/menu.lst

Kernel parameters

Kernel command line parameters are often supplied by the bootloader.

GRUB

Edit the file /etc/default/grub and append your kernel options to the line GRUB_CMDLINE_LINUX_DEFAULT="":

/etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="ro quiet splash"

Re-generate grub.cfg with:

# grub-mkconfig -o /boot/grub/grub.cfg

The resulting /boot/grub/grub.cfg will be:

/boot/grub/grub.cfg
[...]

menuentry 'Arch GNU/Linux, with Linux core repo kernel' [...] {
[...]
set root='hd0,msdos1'
[...]
linux	/vmlinuz-linux root=/dev/sda3 quiet splash
initrd	/initramfs-linux.img

[...]

GRUB Legacy

/boot/grub/menu.lst
...

# (0) Arch Linux
title  Arch Linux  [/boot/vmlinuz-linux]
root   (hd0,0)
kernel /vmlinuz-linux root=/dev/sda3 ro
initrd /initramfs-linux.img

...

Syslinux

For Syslinux it's on the APPEND line:

APPEND root=UUID=988d4e11-8237-4af3-5ab6-77627128g9d0 ro vga=current quiet splash