how-to-password-protect-ubuntus-boot-loader

[contro opinion <contropinion@gmail.com>]

http://www.howtogeek.com/102009/how-to-password-protect-ubuntus-boot-loader/

here is an article to tell setup password protect on ubuntu,i want to do that way on debian

the steps are as the following  on ubuntu

1.grub-mkpasswd-pbkdf
2.
 sudo nano /etc/grub.d/40_custom 
    set superusers=”name”
    password_pbkdf2 name [long string from earlier]

3.sudo update-grub 

4.sudo nano /etc/grub.d/
omitted

5.omitted

in my debian ,i can't   sudo update-grub ,
there is no command update-grub in debian  (my system is debian6+grub1.99)

how can i do now?