Dual boot w Ubuntu problem

[Stuarticus]

Just decided that i wanted to have a proper BT install rather than waiting forn the liveCD to load, install went well but thought that the bootloader would be as smart as the GRUB loader that came with Ubuntu and would atoconf - no such luck...
Now system boots up straight into BT through LILO, and I'm not sure how to restore GRUB or setup LILO, tried using the guides to help by following the instructions for XP dual boot - LILo.conf:
boot = /dev/sda
prompt
timeout = 20
bitmap=/boot/splash.bmp
change-rules
reset
vga = 0x317
default=Ubuntu
image = /boot/vmlinuz
root = /dev/sda3
initrd = /boot/splash.initrd
label = Backtrack
read-only
other=/dev/sda1
label=Ubuntu
table=/dev/sda

But error message on lilo -v:

Warning: LBA32 addressing assumed
Reading boot sector from /dev/sda
Using BITMAP secondary loader
Calling map_insert_data
Mapping bitmap file /boot/splash.bmp
Calling map_insert_file

Boot image: /boot/vmlinuz
Mapping RAM disk /boot/splash.initrd
Added Backtrack

Boot other: /dev/sda1, on /dev/sda, loader CHAIN
Fatal: First sector of /dev/sda1 doesn't have a valid boot signature

Now scared to reboot in case I have bricked MBR any suggestions?

[shamanvirtuel]

next time usb..... more reliable than hard drive real installs

[Stuarticus]

hehe, thanks...

[Stuarticus]

Problem solved.

In backtrack or other linux

$ cvs -z3 -d:psnerver:anonymous@cvs.savannah.gnu.org:/sources/grub co grub

$ cd /root/grub

$ ./configure

$ make install grub



Then as Ubuntu forum user Catlett suggests:


Code:

sudo grub

This will get you a "grub>" prompt (i.e. the grub shell). At grub>. enter these commands

Code:

find /boot/grub/stage1

This will return a location. If you have more than one, select the installation that you want to provide the grub files.
Next, THIS IS IMPORTANT, whatever was returned for the find command use it in the next line (you are still at grub>. when you enter the next 3 commands)

Code:

root (hd?,?)

Again use the value from the find command i.e. if find returned (hd0,1) then you would enter root (hd0,1)

Next enter the command to install grub to the mbr

Code:

setup (hd0)

Finally exit the grub shell
Code:

quit

That is it. Grub will be installed to the mbr.
When you reboot, you will have the grub menu at startup.