How to reset a forgotten or lost Root password on VMware vSphere ESX 4

In the event the root password is unknown,  connect to the ESX host console and restart the machine.

1. When the ESX host boots to the grub menu, hit the “a” key.
2. Add the command  “single” to the string and click enter
3. Wait for ESX to go through the boot process
4. At the command prompt type “passwd.”
5. Enter your new password.
6. Restart the host ie.  shutdown -r now

This process is only used to reset a lost or forgotten password. 
A video demo of this process is shown on my virtualisation website http://www.elasticsky.co.uk/videos