Could not find /boot/grub/menu.lst file. Would you like /boot/grub/menu.lst generated for you? (y/N) y
/usr/sbin/update-grub: line 783: /boot/grub/menu.lst: Permission denied
ubuntu@ubuntu:/boot$ sudo update-grub
Searching for GRUB installation directory ... found: /boot/grub
Testing for an existing GRUB menu.lst file ... 

Could not find /boot/grub/menu.lst file. Would you like /boot/grub/menu.lst generated for you? (y/N) y
Searching for splash image ... none found, skipping ...
Found kernel: /boot/vmlinuz-2.6.20-15-generic
Found kernel: /boot/memtest86+.bin
Updating /boot/grub/menu.lst ... done