GRUB Password protection

GRUB Password protection mainly prevents malicious modification of the ROOT password of your host.

1. Generate a password
[Root @ localhost ~] # Grub-md5-crypt
Password:
Retype password:
$9U6aAg751 $6l/ob1 $8KK/bMZFhK6NQw1
[Root @ localhost ~] #

2. Modify the Grub. conf file

[Root @ localhost ~] # Vi/etc/grub. conf

Default = 0
Timeout = 5
Splashimage = (hd0, 0)/grub/splash.xpm.gz
Hiddenmenu

Password -- md5 $9U6aAg751 $6l/ob1 $8KK/bMZFhK6NQw1
Title CentOS (2.6.32-431. el6.x86 _ 64) -- add password information before this line
Root (hd0, 0)
Kernel/vmlinuz-2.6.32-431.el6.x86_64 ro root =/dev/mapper/VolGroup-lv_root kernel LANG = en_US.UTF-8 rd_NO_MD kernel = VolGroup/lv_swap SYSFONT = latarcyrheb-sun16 crashkernel = auto kernel = VolGroup/lv_root KEYBOARDTYPE = pc KEYTABLE = us rd_NO_DM rhgb quiet
...
....

3. Save and exit

4. View Reboot results