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Re: Configure GRUB 2

On Thu, Nov 08, 2012 at 01:40:37PM +0100, tv.debian@googlemail.com wrote:
> If you don't want to boot the previous kernel, but a specific one
> (known to work), cat the /boot/grub/grub.cfg and locate the entry of
> the kernel you want as a default. What you want is the part
> immediately following the "menuentry" stanza, usually in between
> single quotes (you don't need the whole line. Here is and example
> grub.cfg menu entry:
> menuentry 'Debian GNU/Linux, avec Linux 3.2.0-3-amd64 [...]
> You would need to put the following entry in /etc/default/grub:
> GRUB_DEFAULT='Debian GNU/Linux, avec Linux 3.2.0-3-amd64'
> Then execute "update-grub".
> I think this is a bad idea outside of a temporary test situation, if
> you forget such a hack you'll be booting an old kernel possibly
> vulnerable or troublesome as the default one. The config will also
> break when this specific kernel version is removed by the package
> manager.

A couple of points.

GRUB_DEFAULT takes a menu, not a title.

Also, if you want to simulate the setting of GRUB_DEFAULT on a one-off
basis, look at the "grub-reboot" command.

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