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http://freebsdwiki.org/index.php/GRUB_FreeBSD
root@gate:~# cat /boot/grub/menu.lst default saved timeout 10 title FreeBSD root (hd0,0,a) kernel /boot/loader savedefault title Ubuntu root (hd0,1) kernel /boot/vmlinuz-2.6.24-16-server root=UUID=08931346-445f-4a43-b136-dcb96397b8c6 ro quiet splash initrd /boot/initrd.img-2.6.24-16-server savedefault title Windows NT/2000/XP root (hd0,2) savedefault makeactive chainloader +1
# grub-set-default 1