I had a previous Ubuntu 11.10 installation which was done using Wubi in
D: drive of my computer. The corresponding grub.cfg entries are:
http://paste.ubuntu.com/1546414/
Now I wanted to use Ubuntu 12.04 so I deleted the previous
installation from the D: drive
and then installed Ubuntu 12.04. I accidentally installed it to the C: drive instead of installing it in
the D: drive, and the grub entries here are
http://paste.ubuntu.com/1546422/
I didn't have enough space in the C: drive so I moved the ubuntu folder from
C: drive to D:, but surprisingly it could not boot.
Realizing that grub.cfg needed to be updated I opened the old grub.cfg
(this 11.10 was installed in D: drive)
and checked the UUIDs grub.cfg which are (for previous 11.10 install in D: drive)
search --no-floppy --fs-uuid --set=root 8E9E86339E86143D
linux /boot/vmlinuz-3.2.0-23-generic root=UUID=8E9E86339E86143D
loop=/ubuntu/disks/root.disk ro
in the new 12.04 grub.cfg (which was accidentally installed in C: drive )
has following grub.cfg (for 12.04 in C: drive)
search --no-floppy --fs-uuid --set=root E4ACAFF5ACAFC082
linux /boot/vmlinuz-3.2.0-29-generic root=UUID=E4ACAFF5ACAFC082
loop=/ubuntu/disks/root.disk ro
I have since moved the entire Folder C:\ubuntu to D: drive so it is
now D:\ubuntu
what I notice is the old UUID entries (from 11.10 ) are not the same
as the UUID entries in 12.04 is there a way to fix this?
Best Answer
Hold down Shift key after selecting Ubuntu. Press E to edit grub entries manually if you know how. Then Ctrl+X to boot.
If you don't know how to edit the grub entries, press C to get to a grub prompt. Then enter the following:
After booting, enter
sudo update-grub
to fix grub.cfg.