How to password protect GRUB?

There are only 3 steps to password protect users to edit grub properties while system booting:

1) Run following command to generate MD5 encrypted password:


root@localhost# grub-md5-crypt
Password:
Retype password:
$1$yAr5c0$ZYlcLULaS2rwOvry1B4gX/


2) Copy MD5 encrypted password of above command

3) Paste copied MD5 encrypted password in menu.list/grub.conf file :

default = 0
timeout=5
password --md5 $1$yAr5c0$ZYlcLULaS2rwOvry1B4gX/

Thats it!!!

Now whenever user's try to run GRUB commands or try to change booting parameters at the time of BOOT, above entered text password will be required!!