Mentor for Restoring Grub from Ubuntu installation CD
yghannam7388 at gmail.com
Sun Mar 22 17:43:33 GMT 2009
My name is Yazen Ghannam and I'm an Electrical Engineering student at
the University of Central Florida, USA. While trying to find a mentor
for a couple of other projects, someone mentioned this project. So for
the past two days I've been working on it a bit and I think it would
also be a good one for GSoC. Here's what I posted on the Wiki.
*Student*: Yazen Ghannam <https://launchpad.net/%7Eyghannam7388>
There should be a way to restore Grub from the Ubuntu installation CD
instead of having to boot into a LiveCD and doing everything from the
Here's the work done so far:
1. I've tried using Super Grub Disk by adding it to the Live CD and
booting it with Isolinux. Since Grub itself is a bootloader this
didn't work well.
2. Since memtest86+ can be loaded by Isolinux, I thought about
getting a binary version of Grub.
3. I found Grub4DOS which is almost exactly like Grub but they
package it in a convenient executable.
4. I added Grub4DOS to the Live CD and created an entry for it in the
menu.cfg for Isolinux.
I can boot into grub from the live cd now and Grub4Dos
<https://wiki.ubuntu.com/Grub4Dos> can automatically find
/boot/grub/menu.lst on my Ubuntu partion.
6. I can enter the grub commandline and follow the step to reinstall
grub mentioned on the Ubuntu Wiki.
Things that don't work yet but should (and background info):
Grub4Dos <https://wiki.ubuntu.com/Grub4Dos> cannot find the
menu.lst located on the Live CD but it can find the one located on
the Ubuntu partition. Grub4Dos <https://wiki.ubuntu.com/Grub4Dos>
looks for a menu.lst and starts in its local directory, but I
cannot make it find the one that comes with it. When I make a CD
with Grub4Dos <https://wiki.ubuntu.com/Grub4Dos> on it only using
the grldr bootloader, everything works fine. So I believe the
issue to be with Isolinux.
Once I can get Grub4Dos <https://wiki.ubuntu.com/Grub4Dos> to find
the right menu.lst, all that is left is writing a menu with the
the options and commands we want. For example, a five option menu:
1. Automatic reinstall (used if only one linux partition is
found), 2. Manual reinstall (used if two or more linux partitions
are found, user selects which to use), 3. Boot Partition, 4. Back
to Main Menu, 5. Reboot/Shutdown.
One solution to Grub4Dos <https://wiki.ubuntu.com/Grub4Dos> not
finding the menu.lst is to add the commands we need to the the
/boot/grub/menu.lst. We can also restructure it with submenus. For
example, memtest86+ and Reinstall Grub both under an "Ubuntu
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