Grub2 and multiple boot different ubuntu versions

[Colin Law]

On 24 March 2010 15:21, Colin Law <clanlaw at googlemail.com> wrote:
> On 24 March 2010 14:41, Goh Lip <g.lip at gmx.com> wrote:
>> Colin Law wrote:
>>
>>> Hi
>>>
>>> I had a double boot setup with XP and Karmic.  I installed Lucid Beta
>>> 1 in a separate partition and on boot it gives me the menu with Lucid
>>> at the top followed by Karmic kernels and XP, and all works well.  As
>>> Lucid is just for testing, however, I want it do default to Karmic
>>> boot so I set GRUB_DEFAULT=5 in /etc/default/grub, run sudo
>>> update-grub and again all is well.
>>> Each time the Lucid kernel is updated, however, I need to add two to
>>> GRUB_DEFAULT as there are new kernels above it.  I wonder whether it
>>> is possible to rearrange the grub menu so Karmic is at the top and I
>>> can leave the default at 0.  I have contemplated booting into Karmic
>>> and running update-grub but I hesitate to do this in case it is a bad
>>> idea, not really understanding how grub works.
>>> It would be nice if grub allowed a regex setting for the default boot
>>> when specifying a string, defaulting to the first matching name, but I
>>> have not seen this in the docs.  It would seem like a trivial
>>> extension.
>>>
>>> Colin
>>
>>
>> Try 'saved' as default. Yes, it will boot last booted entry not a
>> 'preselected' entry.
>
> I thought of that, but it is not really what I want.  If I boot into
> lucid then power off I generally still want it to boot to karmic next
> time.  Also, presumably, if there were a new karmic kernel (when
> booted to karmic of course) on reboot it would presumably go to the
> old one not the new one.
>
> I am about to try update-grub from karmic since Sam said it should be
> ok and no-one has said otherwise.  If you don't here from me again
> then I am presumably in the proverbial.

Well that did not do any harm, in fact it did not change the boot
menu, Lucid is still at the top.

Colin