How to break Linux ROOT password?

METHOD 1

Here are the all steps to change password for root in linux:
1)when u reached at the grub screen press 'e' on linux
2)line which contains the word 'kernell' press 'e'
3)go to end of that line and write 'linux single'
4)the press 'esc' twice and press 'b' to reboot the system
5) now wait for the prompt u get, write easy command there:
passwd root

OR

METHOD 2

Please try out the following steps to change the root password:
1. Boot the computer with Linux Installation CD.
2. Enter into Linux Rescue mode by enering the following command in boot screen.
boot: linux rescue
3. When the sh prompt is reached, enter the following commands to change root password.
#chroot /mnt/sysimage
#passwd
The above steps will prompt you to enter your new password.

How to block Messenger (or other apps) via Group Policy

Q: Is there an easy way to block the messenger services (especially msn messenger) at say the SBS2003 server level (ie so no client computers can connect)?

A: You can handle that by a GP and the options within the Group Policy to
either allow Messenger to work or even load as far as that goes.

Open Server Management and then Drill down to Advanced Management and then Group Policy Management and then Domains and then Your Domain Name and then Group Policy
Objects and then right click on Small Business Server Client Computer and
then Edit.

This will open the Policy Editor and under Computer Configuration and then Windows Components and then Windows Messenger you have 2 options there to turn off Messenger for running and or loading initially.

Also in this Policy there is a place to not allow certain Applications to run. Just add the exe for Yahoo here and this will block that from running also. This works on 2000 Pro Workstations and above.