Restore Grub2 When starting the PC bootloader Grub2 not start or gives error here is a guide on how to address
Required :
a Live CD of Ubuntu 9.10 or higher
Here's how:
1: Boot the Ubuntu LiveCD in the civil trial
2: Open the terminal from
Applications> Accessories> Terminal 3: Type the command sudo fdisk-l
4: Recognize the partition in Ubuntu is installed
5: Note the name.
Over the next steps will be considered as a partition of Ubuntu
called the partition / dev/sda1 6: Type the following command
replacing / dev/sda1 with as
the partition where you installed Ubuntu
7: Mount the partition by typing:
sudo mount / dev/sda1 / mnt 8: Then mount the other devices with commands:
sudo mount - bind / dev / mnt / dev sudo mount - bind / proc / mnt / proc sudo mount - bind / sys / mnt / sys 9: Make a chroot
on your system with the command:
sudo chroot / mnt 10: If Ubuntu is installed with a partition
/ boot mount separate
also the one with the command mount / dev/sda2 / boot ; replacing
/ dev/sda2 the name of the partition / boot 11: At this point to install
Grub2 type the command:
grub-install / dev / sda update-grub2 Se si ricevono errori è possibile riprovare con il comando:
grub-install --recheck /dev/sda 12: Uscire dal
chroot con la combinazione di tasti:
CTRL+D o
digitando il comando:
exit 13: Smontare tutti i dispositivi con il comando:
cd ~ sudo umount / mnt / dev sudo umount / mnt / proc sudo umount / mnt / sys ; sudo umount / mnt / 14: Restart your system and remove the Live CD
.
I hope to be helpful.
you soon.
Source:
http://wiki.ubuntu-it.org/AmministrazioneSistema/Grub/Ripristino