Can I reinstall grub without completely reinstalling Linux?Yes. (I seem to need to do this on a fairly regular basis, I don't know why :-)
Boot a rescue disk or similar and do what ever is necessary to do a "chroot" -- booting the CD as a rescue disk does this by default, the sysadmin rescue disk offers it as a choice. Anyway, then do
chroot /mnt/sysimage
and
grub-install '(hd0)'
This will put the grub boot sector back. You can also do
grub-install '(fd0)'
which will put a boot sector on a floppy. The rest of the boot (the kernel and whatnot) still comes from the hard disk, but it's a useful floppy to have around when you're installing Windows as it gives an easy way back into Linux without having to go through booting a rescue disk -- once you're running Linux again you can just "grub-install '(hd0)'" to re-install the grub boot sector.
jch
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