RE-INSTALLING GRUB 2 Ubuntu

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Beberapa hari yang lalu iseng-iseng install windows 7 di Netbook Lubuntu ku. Ternyata muncul masalah klasik : Grub Lubuntu hilang, akibatnya proses booting ke Hardisk terganggu. Browsing di internet banyak sekali cara menyelesaikannya, namun belum ada yang cocok sehingga berhasil. Nah Tutorial kali ini saya akan memilihkan satu cara untuk menginstall kembali Grub 2 setelah terhapus saat instalasi windows 7 :

Instruksinya ada disini :

https://wiki.ubuntu.com/Grub2#Recover

Pertama-tama, siapkan LiveCD Linux yang digunakan (saya menggunakan Flashdisk bootable Lubuntu) (Installasi Flasdisk menjadi bootable menggunakan pendrive-linux)

Oke, langsung saja :

1) Boot to the LiveCD Desktop (Ubuntu 9.10 or later). Please note that the Live CD must be the same as the system you are fixing - either 32-bit or 64-bit (if not then the chroot will fail).

2) Open a terminal (Applications > Accessories > Terminal).

3) Determine your normal system partition - (the switch is a lowercase "L") 

sudo fdisk -l

If you aren't sure, 

run df -Th

Look for the correct disk size and ext3 or ext4 format.

4) Mount your normal system partition:
Substitute the correct partition: sda1, sdb5, etc. sudo mount /dev/sdXX /mnt
Example: 

sudo mount /dev/sda1 /mnt

5) Only if you have a separate boot partition: sdYY is the /boot partition designation (for example sdb3)

sudo mount /dev/sdYY /mnt/boot

6) Mount the critical virtual filesystems:

sudo mount --bind /dev  /mnt/dev
sudo mount --bind /dev/pts  /mnt/dev/pts
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys  /mnt/sys

7) Chroot into your normal system device:

sudo chroot /mnt

8) If there is no /boot/grub/grub.cfg or it's not correct, create one using

update-grub

9) Reinstall GRUB 2:
Substitute the correct device - sda, sdb, etc. Do not specify a partition number.

grub-install /dev/sdX

10) Verify the install (use the correct device, for example sda. Do not specify a partition):

sudo grub-install --recheck /dev/sdX

11) Exit chroot: CTRL-D on keyboard

12) Unmount virtual filesystems:

sudo umount /mnt/dev/pts
sudo umount /mnt/dev
sudo umount /mnt/proc
sudo umount /mnt/sys

13) If you mounted a separate /boot partition:

sudo umount /mnt/boot

14) Unmount the LiveCD's /usr directory:

sudo umount /mnt/usr

15) Unmount last device:

sudo umount /mnt

16) Reboot.

sudo reboot

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Sumber : askubuntu