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# <a name="Recipes_for_bootable_GNU_Mach_Hu"> </a> Recipes for bootable GNU Mach/Hurd Live CD
## <a name="Greg_s_recipe"> Greg's recipe </a>
In my attempts to get a bootable CD for the Hurd here's the recipe I followed, your's will be similar. I needed a grub-0.92, with a patch from <http://alpha.polynum.org/misc/>, and version 1.16 of mkbimage (I don't exactly remember where I got that from).
You can grab a copy of it at <http://sleepingsquirrel.org/hurd/hurdcd.iso.gz>, which is a gzipped bootable \*.iso with the copy of the patched grub and the version of mkbimage I used. Here's the recipe I followed (under linux).
# mkdir ./2.88floppy
# mkdir ./isodir
# cp grub/* 2.88floppy/boot/grub/
# cp grub/* isodir/boot/grub/
# cd 2.88floppy
# tar -cf ../floppyimg.tar *
# cd ..
# mkbimage -f floppyimg.tar -t 2.88
# cp 2.88.image isodir/
# mkisofs -r -b 2.88.image -c boot.catalog -o hurdcd.iso isodir/
# cdrecord -v speed=4 dev=0,0,0 -data hurdcd.iso
That was the recipe for using a floppy image. If you use the `-t hd` switch of `mkbimage`, you'll get an ext2fs El-Torito HD emulation image that can be any size (I've got one here 300+ MB). You can then use `root (hd0,0)` in Grub to boot something. Also, invoking `mkbimage` with no parameters will give you some additional help messages.
-- [[Main/GregBuchholz]] - 05 Nov 2003
## <a name="Another_recipe_for_a_bootable_GN"> </a> Another recipe for a bootable GNU CD
[screenshot](http:///mycelium.afraid.org/Screenshot2.png)
### <a name="What_you_ll_need"> What you'll need </a>
* A [stage2\_eltorito](http://mycelium.dyndns.org/stage2_eltorito) from [grub 0.95](http://www.gnu.org/software/grub)
* A [base system](http://www.update.uu.se/~ams/gnu/gnu-2004-12-04.tar.bz2)
* [iso9660fs.static](http:///mycelium.dyndns.org/iso9660fs.static) or just build your own, it should work with CVS
### <a name="HowTo"> HowTo </a>
# mkdir iso
..(at this point untar or setup base system)
# mkdir -p iso/boot/grub
# cp iso9660fs.static iso/hurd
# cp stage2_eltorito iso/boot/grub
..(edit iso/boot/grub/grub.conf)
# mkisofs -R -b boot/grub/stage2_eltorito -no-emul-boot \
-boot-load-size 4 -boot-info-table -o livecd.iso iso/
**_Note:_** The following files must **\_NOT\_** be symlinks!
* `/boot/gnumach`
* `/hurd/iso9660fs.static`
* `/hurd/exec`
* `/lib/ld.so.1`
## <a name="Contents_of_grub_conf"> Contents of grub.conf </a>
timeout 60
default 0
title GNU/Hurd CD
#uppermem 523648 #this may need to be set
#root (cd)
kernel /boot/gnumach root=device:hd2 #set device to your cdrom device
module /hurd/iso9660fs.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)
**_Note:_** The `root (cd)` line may prevent some computers from booting the livecd.
-- [[Main/AndrewResch]] - 22 Feb 2005
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