How to set password on grub

1. Login as root.
   redarix:~ # grub-md5-crypt
   Password:
   Retype password:
   $1$zrqqv$smtnY9hrvn7WvFunfSPkR0
2. Use your favorite editor to edit /boot/grub/menu.lst and add the md5 password result to the menu.lst.
   redarix:~ # vi /boot/grub/menu.lst
   
   title openSUSE 11.0 - 2.6.25.20-0.1
   root (hd0,0)
   password --md5 $1$zrqqv$smtnY9hrvn7WvFunfSPkR0
   kernel /boot/vmlinuz-2.6.25.20-0.1-pae root=/dev/disk/by-id/scsi-SATA_MAXTOR_STM38021_6RW1G08R-part1 resume=/dev/sda5 splash=silent showopts
   initrd /boot/initrd-2.6.25.20-0.1-pae
3. Reboot your OS.
4. Finish.