Grub Configuration

[Tom H]

On Tue, May 25, 2010 at 4:36 PM, Karl Larsen <klarsen1 at gmail.com> wrote:
> On 05/25/2010 02:04 PM, Tom H wrote:
>> On Tue, May 25, 2010 at 12:28 PM, NoOp<glgxg at sbcglobal.net>  wrote:
>>
>>> On 05/25/2010 02:16 AM, Maurice McCarthy wrote:
>>>
>>>> http://grub.enbug.org/HelpContents
>>>>
>>> Perhaps instead:
>>> http://grub.enbug.org/FrontPage
>>> or
>>> https://help.ubuntu.com/community/Grub2
>>> might be helpful.
>>>
>> The Ubuntu help page is very good but you can also consult these
>> http://kubuntuforums.net/forums/index.php?topic=3106368.0
>> http://manual.sidux.com/en/sys-admin-grub2-en.htm
>> http://members.iinet.net/~herman546/p20.html
>> http://ubuntuforums.org/showthread.php?t=1195275
>> http://wiki.archlinux.org/index.php/GRUB2
>> http://www.dedoimedo.com/computers/grub-2.html
>> https://help.ubuntu.com/community/Grub2
>> https://wiki.kubuntu.org/Grub2
>> https://wiki.ubuntu.com/Grub2
>>
>
> https://help.ubuntu.com/community/Grub2
>
> This is the best information available for Grub2. It includes this for
> example:
>
>     $ grep menuentry /boot/grub/grub.cfg
>
> will list every partition on your hard drives, and from this you can
> decide which partition to make default and then do so with:
>
>     $ sudo grub-set-default Linux 2.6.32-22-generic
>
> as an example. I think if you mess up your system, you can use these two
> commands from a Live CD.

"Best" can be a subjective judgment. I have not read these links for a
while but I remember them as *mostly* equivalent in content whilst
some of them are presented out better than others - and therefore some
people will prefer one page over another.

The "grep..." command that you list above is hardly magical and if the
instruction to use "grub-set-default x" does not include setting
"GRUB_DEFAULT=saved" in "/etc/default/grub" then it is incomplete.

So if you want to use grub-set-default while booted from a Live CD,
you will have to mount the HD, change GRUB_DEFAULT, run update-grub,
and run grub-set-default. You might need to be chrooted one or both of
the last two.