You can gain root access and then reset your own account password.
http://www.debuntu.org/2006/04/24/34-ubuntu-default-root-password-or-the-sudo-way
From: andre harty [mailto:yello...@hotmail.com]
Sent: 05 September 2012 00:41
To: grase-...@lists.sourceforge.net
Subject: [GRASE-Hotspot] Password reset