Forgotten root Password

I forgot my Red Hat Server root password. What i need to do to recover the root password?

In RedHat Linux, we can recover the root password by log in single-user mode and create a new root password.

Below are the steps:-

• Power on, or reboot your RedHat Machines
• At the boot loader menu, use the arrow keys to highlight the installation you want to edit and type [A] to enter into append mode.

• After that, you should see the screen similar to the following

grub append> ro root=/dev/VolGroup00/LogVol00 rhgb quiet

• Press the Spacebar once to add a blank space, then add the word single and press Enter to tell GRUB to boot into single-user Linux mode.

grub append> ro root=/dev/VolGroup00/LogVol00 rhgb quiet single

• After it finishes loading, you will get a shell prompt

sh-3.2#

• Now you can change the root password by enter the following command

sh-3.2# passwd root

• After that, reboot your machine

sh-3.2# reboot

Now you should able to log in to root with your new changed password.