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Describes the GNU/Hurd boot process.
# <a name="Bootloader"> Bootloader </a>
[GRUB](http://www.gnu.org/software/grub/) (GRand Unified Bootloader) is the default (and as far as I know the only supported ) bootloader for GNU/Hurd and is the initial process.
GRUB can be used for booting multiple Operating Systems on a given machine. Device naming convention for GRUB is different than that of the Hurd. Where the first partition on the primary IDE drive in GNU/Hurd is hd0s1, in GRUB it is (hd0,0). In the case of GNU/Hurd, the first thing that GRUB loads is kernel image.
Here is a copy of GNU/Hurd multi-user entry from menu.lst. The first two lines are primarily informational and are what get displayed on the GRUB boot menu.
# Entry 2: 1st partition on first HDD
title GNU/Hurd (IDE 1st partition - hd0s1 multi-user)
root (hd0,0)
kernel /boot/gnumach.gz root=device:hd0s1
module /hurd/ext2fs.static --multiboot-command-line=${kernel-command-line} \
--host-priv-port=${host-port} \
--device-master-port=${device-port} \
--exec-server-task=${exec-task} \
-T typed ${root} $(task-create) $(task-resume)
module /lib/ld.so.1 /hurd/exec $(exec-task=task-create)
**_N.B. the escaped new lines above should end in only a back slash, no spaces!_**
The line "root (hd0,0)" tells GRUB where to look for the root partition. Notice that the (hd0,0) is using GRUB naming conventions.
The next line loads the gnumach kernel image itself. Notice here the root=device:hd0s1 argument. This is now using GNU/Hurd device naming convention, telling the Hurd where the root partition exists.
----
-- [[Main/BarryDeFreese]] - 29 May 2003
Minor formatting and edit check.
On a side note. The actual description of the GNU/Hurd boot process is a good idea but keeping duplicated information to a bare minimum must be the guide line for a "book" like this. See other topics for more information on Grub configuration for instance.
-- [[Main/JoachimNilsson]] - 30 May 2003
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