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It is relatively easy to boot GNU/Linux from GRUB, because it somewhat resembles to boot a Multiboot-compliant OS.
search --set=root --file /vmlinuz
or similar may help you
(see search).
linux
(see linux):
grub> linux /vmlinuz root=/dev/sda1
If you need to specify some kernel parameters, just append them to the command. For example, to set acpi to ‘off’, do this:
grub> linux /vmlinuz root=/dev/sda1 acpi=off
See the documentation in the Linux source tree for complete information on the available options.
With linux
GRUB uses 32-bit protocol. Some BIOS services like APM
or EDD aren’t available with this protocol. In this case you need to use
linux16
grub> linux16 /vmlinuz root=/dev/sda1 acpi=off
initrd
(see initrd)
after linux
:
grub> initrd /initrd
If you used linux16
you need to use initrd16
:
grub> initrd16 /initrd
boot
(see boot).
Caution: If you use an initrd and specify the ‘mem=’
option to the kernel to let it use less than actual memory size, you
will also have to specify the same memory size to GRUB. To let GRUB know
the size, run the command uppermem
before loading the
kernel. See uppermem, for more information.