Hi,
I am a new user in Linux. I am using Fedora 14 OS. I want to protect my computer, so nobody  can enter my PC. For this reason, I gave an Admin Password. But one of my friend unlocks it, using grub. So is there anyway, that I can give password in the Grub of Fedora OS? If yes, then give me detailed information about that. Thanks.
Yes, you can give a password in the grub of your operating system. For that, you need to know some commands. First of all, you have to know about  Terminal. There is a program in the system tools, in the Menu bar of Fedora called Terminal.
You have to open it. Then use this command:
#su login
#Password: give your admin password
Now type grub-md5-crypt command in the terminal. This will generate an encrypted password.
#Â grub-md5-crypt
The output will be like this:
Password:<ENTER-YOUR-PASSWORD>
Retype password:<ENTER-YOUR-PASSWORD>
$1$NYoR71$Sgv6pxQ6LG4GXpfihIJyL0
The password is generated. Now your task will be to copy this information, to a file named grub.conf
go to /boot/grub/grub.conf and edit the file. When it opens add the password in the file as below:
password –md5 $1$NYoR71$Sgv6pxQ6LG4GXpfihIJyL0(This is no same for you)
The .conf file is like this:
default        0
timeout        5
password –md5 $1$NYoR71$Sgv6pxQ6LG4GXpfihIJyL0
title           Debian GNU/Linux, kernel 2.6.13.4-cust-en-smp
root          (hd0,0)
kernel       /boot/vmlinuz root=/dev/hda3 ro
savedefault
boot
Now save the file & close it. That will do the job. Reboot your PC and try to go to grub & you will be asked for a password. Now you’re protected.
