Reinstall Grub?

[Alaric]

I recently installed Windows 98 on my Debian computer and, obviously, I destroyed my MBR. What is the best way to reinstall grub? I have a knoppix CD or two lying around and would prefer to se them. I REALLY don't feel like downloading Debian for three hours through the net-inst.

[Roxoff]

This is quite simple, and quite a handy thing to learn.

1. Boot up off our knoppix live CD.
2. Make (or use an existing) mount point for your existing system, /mnt/sysrecue or summat like that.
3. Mount your own / on /mnt/sysrescue ('mount /dev/hda2', or whatever your / is)
4. Mount your /boot on /mnt/sysrescue/boot ('mount /dev/hda1', or whatever your /boot is)
5. Chroot to your system with 'chroot /mnt/sysrescue'
6. Run the grub installer, 'grub-install'.
7. Reboot, not forgetting to remove the knoppix disk from the CD, and you should have your system back.

Dont forget that you may need to add entries to your /boot/grub/grub.conf for the windows system to boot, but if it's a re-install it should already be in there.

[Alaric]

shoot.... I think that I accidentally destroyed my /usr partition during the installation (I repartitioned using fdisk without thinking when the FAT32 partition I set up was too large to use Win98 on). Is there any way to rebuild my /usr without reinstalling everything with a net-inst? Is there a way to keep the files I have stored elsewhere intact, but install everything missing in my /usr?