I had Ubuntu 11.10 on my laptop, then I determined to install Windows 7 and keep both of them on my machine (dual boot), then I installed Window 7.
And then Windows 7 was running, but Ubuntu didn't appear in the grub menu.
I then ran Ubuntu from a live usb disk and edited GRUB to make Ubuntu boot:
sudo mount /dev/DEVICENAME_FROM_STEP_ONE /mnt sudo rm -rf /boot sudo ln -s /mnt/boot /boot
Now Ubuntu 11.10 is booting automatically when the laptop start, but Windows 7 doesn't appear at all in the grub (there is no grub menu at all).
Now I want to let Windows 7 appear in the grub menu to let me choose (Ubuntu + Windows 7). I've read these commands but it doesn't work with me:
sudo gedit /boot/grub/menu.lst
A large text file will open and at the bottom leave a line and add this:
(Just a blank text file opened with me -not a large one- i don't know why)
title windows 7 beta (Loader) root (hd0,1) savedefault makeactive chainloader +1
Do not type this line but if that does not work on re-boot try
hd0,2 and so on until it works.