I was trying to extend my / partition using ubuntu live cd after installation done before 6 months. For installing a software i needed 9GB more space in my root partition. The size of the root partition was 24gb only. To find a safe solution i used my virtual box OS, and after booting from ubuntu installation disk and extending the root partition using GParted worked like a charm. So I chosen to take the risk for my ubuntu 14.04 LTS version which is my host. After booting to a live ubuntu 14.04 cd I was able to delete an ntfs partition which was above my / partition for ubuntu. the resizing of my 24gb space to 61gb also didnt gave any error. But when i rebooted it ended up with a grub rescue menu. I tried to find a solution but nothing worked at all.
I did this one also:
sudo mount /dev/sda7 /mnt
sudo mount -o bind /dev/ /mnt/dev
sudo grub-install --root-directory=/mnt /dev/sda
sudo chroot /mnt /bin/bash
# Now within the chroot
sudo update-grub
exit
# Now outside chroot
This also didnt helped. Pls help.
You should realize that partitions can be safely expanded only to the right side (i.e bottom part). Any attempt to resize it to the left firstly should have consumed a lot of time and secondly and inevitably destroy the grub. Instead of chrooting and installing the grub, i can suggest you a simpler method.
Live boot and open you /dev/sda7 partition in the file manager. Then, close it and open terminal and type the command.
You don't need to do update-grub as your grub config files are already in the boot directory.
P.S- Note that you need to hit the tab key to get the uuid and then continue. I hope you know the right use of tab key before you proceed.