The first step is to check the names of the partitions:
tepeyolotl@satellite:/$ sudo fdisk -l|grep NTFS [sudo] password for tepeyolotl: /dev/sda1 * 1 13 102400 7 HPFS/NTFS /dev/sda2 13 16908 135705600 7 HPFS/NTFS tepeyolotl@satellite:/$
The fdisk command is only available to the superuser (you can also execute all of this commands from a root terminal), th -l option lists the devices and the outputis piped to the grep to be filtered. We note that the partition we search for is listed in "/dev/sda2".
The next step is create a script to indicate this info to the GRUB.
tepeyolotl@satellite:/$ sudo gedit /etc/grub.d/11_windows
This command opens the file (if it doesn't exists, it will be created), due to the directory in which we're working we need to execute this command as superuser. In the file we should type this:
#!/bin/bash
cat<<EOF
menuentry "Windows 7 Professional"{
set root(hd0,2)
chainloader (hd0,2)+1
}
EOF
The important thing here is the fragment "(hd0,2)" which indicates the partition with the OS that we are adding to the menu. Save the file, and give the file permissions as executable, after that, the only thing to do is update the grub.
tepeyolotl@satellite:/$ sudo chmod +x /etc/grub.d/11_windows tepeyolotl@satellite:/$ sudo update-grub Generating grub.cfg ... Found background image: /usr/share/images/desktop-base/desktop-grub.png Found linux image: /boot/vmlinuz-2.6.32-5-686 Found initrd image: /boot/initrd.img-2.6.32-5-686 Found Windows 7 (loader) on /dev/sda1 done tepeyolotl@satellite:/$
And that's all, the menu entry is now ready to start Windows 7.
