Grub entry for Ubuntu and Windows 8 side by side installation

1.Add following to /etc/grub.d/40_custom

    sudo gedit /etc/grub.d/40_custom

    /etc/grub.d/40_custom
    menuentry "Windows8 UEFI"{

            search --set=root --file /EFI/Microsoft/Boot/bootmgfw.efi

            chainloader /EFI/Microsoft/Boot/bootmgfw.efi

    } 

 

2.Execute following commad

    sudo update-grub