How to re-install GRUB into MBR easily?

[Paul Howarth]

Henry Leparskas wrote:
> We had some sort of problem in an FC3 installation such that GRUB hangs 
> in trying to load Stage1.
> 
> Suspecting an error in the MBR, we booted again from the FC3 CD1 and 
> asked for 'Update'.
> This took us through the dialogue in which the installer said that it 
> didn't recognize the boot loader and would we like to install GRUB. We 
> answered yes, and that we wanted it in the MBR.
> 
> Then, in some insane fit, the installation script tells us that because 
> we have nothing to update it is going to exit without reinstalling the 
> boot loader.
> 
> I recall inflexible behaviour like this from older releases of RH.
> 
> How is one supposed to be able to reinstall GRUB into the MBR without 
> redoing the entire FC3 installation.

http://fedoranews.org/contributors/bob_kashani/grub/

Paul.