[mythtv-users] Forgot password; Choose door A, B or C?

[John Marshall]

> ||   (C) 	do some other sort of a "hack" to get around my password(s) issue(s).

Boot to single-user mode and just set the password to whatever you want. 
  Select the "recovery mode" boot option and then drop to a root prompt, 
then use passwd to set a new one.  You don't need to know the old one.

http://makezine.com/2008/09/03/howto-reset-a-lost-ubuntu-pass/