Grub & Single user mode password Protected

Hi Friends,

I am writing method that how to set up password for Grub & single user mode.

This Method will apply on RHEL 5 & Fedora 8/9/10

Open Terminal

Then login as a root. i.e.

[linuxuser@tejasbarot.com]$su – root
password :- ******

[root@tejasbarot.com ~]# grub-md5-crypt then press enter
That will ask you password
Password:- ******
Retype Password:- ******
$1$8fo8r$OZb9wjN2SsueIePblEzmt. (You will find this type of hash value)

First Backup your grub.conf because if any trouble then you can recover it. Backup your grub file by this way.

cp /boot/grub/grub.conf /boot/grub/grub.conf.bkp

To Make Grub Password Protected Copy that HASH value which was generated by grub-md5-crypt and paste it exact after title line look at below example.

vim /boot/grub/grub.conf

default=0
timeout=0
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
hiddenmenu
title Fedora (2.6.27.9-159.fc10.i686)
password – -md5 $1$8fo8r$OZb9wjN2SsueIePblEzmt. (This Entry will Protect Grub with Password)
root (hd0,0)
kernel /boot/vmlinuz-2.6.27.9-159.fc10.i686 ro root=UUID=063976ce-f9ca-4ced-bb6f-e32290b0faf9 rhgb quiet vga=792
initrd /boot/initrd-2.6.27.9-159.fc10.i686.img

To Make Single User Mode Password Protected Copy that HASH value which was generated by grub-md5-crypt and paste it exact after splashimage line look at below example.

vim /boot/grub/grub.conf

default=0
timeout=0
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
password – –md5 $1$8fo8r$OZb9wjN2SsueIePblEzmt. (This Entry will Protect Single user mode with Password)
hiddenmenu
title Fedora (2.6.27.9-159.fc10.i686)
root (hd0,0)
kernel /boot/vmlinuz-2.6.27.9-159.fc10.i686 ro root=UUID=063976ce-f9ca-4ced-bb6f-e32290b0faf9 rhgb quiet vga=792
initrd /boot/initrd-2.6.27.9-159.fc10.i686.img

Enjoy 🙂