Secure Grub boot loader menu

if you want to gernerate gruby password hashes, use

/sbin/grub-md5-crypt

to protect a unsecure OS from booting by grub password

title DOS
lock
password --md5 password-hash
...

allow to boot without a password, but don't allow to add arguments

...
image=/boot/vmlinuz-version
       password=password
       restricted