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I was using ubuntu 11.10 with gnome-shell. I installed various useful softwares and ran system update using update manager which ran smoothly and asked me to restart my comp at the end. I restarted it to find that Ubuntu entries were missing from the GRUB bootloader and only memory test and windows are showing up. I took a lot of pain in installing various important softwares and cannot afford a re-installation.

Tried to boot from the live cd and installed boot-repair and after running it .. it wasnt working properly .. it was just showing that it was "scanning systems" for more than an hour.

Kindly help. Thank you ..

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Boot into the Ubuntu Live CD and run a few commands.

First, identify which is the Ubuntu partition:

sudo fdisk -l

Next, mount it (replacing sda2 with the appropriate partition number):

sudo mount /dev/sda2 /mnt

And finally, reinstall Grub (replacing sda with the appropriate hard drive):

sudo grub-install --root-directory=/mnt /dev/sda

Now, run this:

sudo update-grub

This should detect your Ubuntu installation and add it to the Grub menu.

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i have tried these and here are the results .. ubuntu@ubuntu:~$ sudo fdisk -l Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0005fa31 – beginer Jan 28 '12 at 4:49
Device Boot Start End Blocks Id System /dev/sda1 * 206848 327886847 163840000 7 HPFS/NTFS/exFAT /dev/sda2 327886848 651470847 161792000 7 HPFS/NTFS/exFAT /dev/sda3 651470848 898387967 123458560 7 HPFS/NTFS/exFAT /dev/sda4 898390014 976771071 39190529 5 Extended /dev/sda5 898390016 914272255 7941120 82 Linux swap / Solaris /dev/sda6 914274304 976771071 31248384 83 Linux Disk /dev/sdb: 4009 MB, 4009754624 bytes – beginer Jan 28 '12 at 4:53
ubuntu@ubuntu:~$ sudo mount /dev/sda6/mnt – beginer Jan 28 '12 at 4:55
mount: can't find /dev/sda6/mnt in /etc/fstab – beginer Jan 28 '12 at 4:56
Spaces and case are very important when entering commands in the Terminal. Judging from your output, here are the exact commands you should run. Try copy/pasting, if possible. 1: sudo mount /dev/sda6 /mnt 2: sudo grub-install --root-directory=/mnt /dev/sda 3: sudo update-grub – SirCharlo Jan 28 '12 at 14:35

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