Hi Skippy,
You probably need to run
"sudo update-grub"
which will regenerate your config file & should provide the menu. Any
persistent changes you want should therefore be made in
/etc/default/grub first.
Afterwards, if your 'buntu system is grub2 you could usefully run
update-grub from there too. If it is a grub1, then you probably have an
entry for Debian in menu.lst something like
title Debian (Direct)
root (hd0,5)
kernel /vmlinuz root=/dev/sda6
initrd /initrd.img
To boot via grub 2 needs another entry like
title Debian (Grub2)
root (hd0,5)
kernel /boot/grub/core.img
boot
Note that partition numbering scheme changes in grub2, it starts from 1
instead of 0.
"grub-install /dev/sda6"
Will not work, there is only one MBR on a disk, not one per partition.
"grub-install /dev/sda"
will update the MBR to boot the system you ran the command from, but I
don't suggest trying that until UR really sure that grub2 is working OK,
and preferably you have some backup boot-able media in case it all goes
pear shaped.
HTH
