Howto reinstall / restore Grub with an Ubuntu

admin — Tue, 30 Oct 2007 21:09:43 +0000

After a windows fresh install, the windows setup decided to drop my MBR to put its stuff in. Fine .. but I want my grub back now !

This is an old trick, but udev added a little complexity, so let’s give it a try. First boot on a Ubunty CD, open a console and run:

(here my linux partition is sda2, second partition on a sata disk)

mkdir /media/mnt
mount /dev/sda2 /media/mnt/
mount -o bind /dev/ /media/mnt/dev
chroot /media/mnt

=> now you are on the destination disk, so you can install grub.
grub-install /dev/sda

Of course you can do a lot more stuff, like changing fstab etc etc .. but the trick is to mount + mount bind + chroot

Grub install on Debian Howto

admin — Tue, 03 Aug 2004 02:39:53 +0000

By default Debian install Lilo on i386 arch. I really like lilo, but after a couple of broken config file and severall other hitch. I decided to install grub. Grub is a bit hard if you never install it before. But mainly because the apt-get install grub doesn’t install a default file. So

apt-get install grub
grub-install /dev/hdXX #where to put the bootloader

Now you can reboot. But to have a nice menu edit a file /boot/grub/menu.lst like that:

default=0
timeout=5
boot=/dev/hda

title Linux-2.6.7
root (hd0,1)
kernel /boot/vmlinuz-2.6.7 root=/dev/hda2 vga=791 ro

title Debian-2.4
root (hd0,1)
kernel /boot/vmlinuz-2.4.26-1-686-smp ro root=/dev/hda2
initrd=/boot/initrd.img-2.4.26-1-686-smp

title Memtest
root (hd0,1)
kernel /boot/memtest86+.bin

Note: My boot is hda2 (hd0,1) second partition of the first disk

Jkx@home » grub

Howto reinstall / restore Grub with an Ubuntu

Grub install on Debian Howto