If you are desperate because you have forgotten root password, don’t be. This tutorial will show you how to reset root.
Boot the system and when you see the following screen, press any key
At the following screen, press e
It will take you the following screen
Highlight the line with vmlinuz in it by using the arrow keys and press e. The next screen will look like below
Now type single or init 1 at the very end of the line so.
Then press enter and b to boot the system with the new argument
The system will boot into single user mode and you will see bash prompt like below
Now change the password
passwd Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully
type in the new password and then reboot
reboot
to restart the system.
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Worked like a charm on my Centos 5.x system on Asus Eee Box 202,
HOWEVER after performing this, for some reason the mouse doesn’t work anymore!!!