Assigning and Recover Grub Password

Assigning Grub Password
# grub-md5-crypt

Password: (enter new password)
Retype password: (repeat password)
$1$s3YiK$M3lxAbqA6JLm2FbDWnClQ0

Copy the contents of grub-md5-crypt  in file tmpfile

# grub-md5-crypt > tmpfile

View the content of tmpfile

# cat tmpfile

Add the resulting hash value to the file /etc/grub.conf

# vi /etc/grub.conf

#hiddenmenu

password --md5 $1$s3YiK$M3lxAbqA6JLm2FbDWnClQ0

:wq

Reboot the system forcefully

#reboot –f

Removing Grub Password
*Boot the System in Rescue Mode
# chroot /mnt/sysimage

# vi /boot/grub/grub.conf

Remove line from /boot/grub/grub.conf
hidden menu
password — md5 <password>
title Red Hat ——