reboot using grub like "lilo -R"

[hdok]

Hello,

Before I used grub as a bootmanager I used lilo.
With lilo it was possible to set the reboot choice for
the next reboot.

So when I was trying new kernel stuff i mostly
typed lilo -R New_Kernel; reboot

One of the choices in my lilo menu was ofcourse New_Kernel.

Is there something simular in Grub:?:

[delta407]

Just change the "default" line in /boot/grub/menu.lst to point to the proper kernel.

[pjp]

I'd think it would be easier to add an "experimental" boot option that points to a kernel rather than change
the default every time. Even that sounds more involved than he was looking for though.

[BradN]

Well, if you were only switching between kernel versions (with the command line staying the same), you could probably put your default kernel on a symlink, and change the symlink before you reboot.

Otherwise, it might be easiest to have a file without the default line, and just

echo "default 2" > menu.lst; cat rest-of-menu.lst >> menu.lst

That should work, I think (might need another blank line at the beginning of the rest-of-menu, I'm not sure).

[delta407]

Hmm... when I add a new kernel, I move it to /boot/bzImage-YYYY.MM.DD and add a new entry to the top of menu.lst. I have it set to "default 0", so it will use the new kernel automagically.

[hdok]

Thanks for all your replies but maybe I did not explain exactly what I meant.

The whole point in lilo -R was that you could override your default only for the next boot.
It was like telling the bootmenu what to do in the next boot.

On my computer Windows is the default because
others use it too. I can not change the default because
the other users wouldn't understand.

Because of this I have to wait for my computer to reboot and make a selection in grub each time I boot.

Using lilo I was able to tell what to boot the next time and then reboot from the commandline.

I think this is not available in grub.

[hanno]

Well, although grub is the default for gentoo, you can still use lilo.
just
emerge lilo
change lilo.conf and run lilo.