Ubuntu

Code:

root 08e28692-0f58-4adl-a240-7c617d1ff6d8
kernel /boot/vmlinuz-2.6.27-7 generic root=uuid=0828692-0f58-4adl-a-
initrd /boot/initrd.img-2.6.27-7-generic

The first line tells GRUB which partition to use as root for any paths present for this boot option.
The second tells it to use (root)/boot/vmlinuz... as the kernel, with the rest of the line as options for the kernel
The third line finally tells it where to find the initrd image.

Try this: boot, select your boot option, press 'e', select the line starting with 'root', press 'e' again, and delete everything after 'root'. Now you have to enter the partition containing your /boot directory, using GRUBs notation. So if /boot is on /dev/sda1, enter hd(0,0). If it's /dev/sdb1, enter hd(1,0). If it's /dev/sda3, enter hd(0,4). You can also use tab for a bit of auto-complete.

you are the best.......thank you sooooooo much.....its worked.....thank you.

Just don't forget to make this permanent by changing the line in your menu.lst too.

how to i do that?

The same way you removed the Vista entry, edit /boot/grub/menu.lst

thank you. all sorted.

i.e. your ubuntu partition is /dev/sda2. you could press 'e' and input commands after the selection.

root (hd0,1)
kernel /boot/vmlinuz-xxx
initrd /boot/initrd-xxx.img

and then you could boot the system to repair the grub installation by $grub-install script.

you'd better make the ubuntu partion active and install the grub stage1 code on the first sector of /dev/sda2