How to set gurb2 password in RHEL7/Centos7

Set Gurb2 Password In Linux

How to reset the root password but its security vulnerable to Linux.Anyone who have physical access to system can easily reset the root password. So we can avoid it by using the setting up of the grub password.

To set the grub password we set superuser name and password in grub configuration file.

For this we have to modify the grub2.conf file in /etc/ directory

firstly we have to create a password by using grub2-mkpasswd-pbkdf2 command copy the password and enter password twice as follows

[root@hackthesec]# grub2-mkpasswd-pbkdf2

Enter password:

Reenter password:

PBKDF2 hash of your password is: grub.pbkdf2.sha512.10000.19074739ED80F115963D984BDCB35AA671C24325755377C3E9B014D862DA6ACC77BC110EED41822800A87FD3700C037320E51E9326188D53247EC0722DDF15FC.C56EC0738911AD86CEA55546139FEBC366A393DF9785A8F44D3E51BF09DB980BAFEF85281CBBC56778D8B19DC94833EA8342F7D73E3A1AA30B205091F1015A85

Then open /etc/grub2.conf file and locate ### BEGIN /etc/grub.d/10_linux ###

section type the code as follows here I used the username is root that is our choice

set superusers "root"export superusers

password_ pbkdf2 root

grub.pbkdf2.sha512.10000.19074739ED80F115963D984BDCB35AA671C24325755377C3E9B014D862DA6ACC77BC110EED41822800A87FD3700C037320E51E9326188D53247EC0722DDF15FC.C56EC0738911AD86CEA55546139FEBC366A393DF9785A8F44D3E51BF09DB980BAFEF85281CBBC56778D8B19DC94833EA8342F7D73E3A1AA30B205091F1015A85

That’s It, Now You can reboot and Press "e" on Grub Menu, It will ask you for the password.