Possible Duplicate:
How do I reset a lost Administrative (root) password?
I just installed xubuntu 12.04, and things seemed to be going fine. I clicked on the updates message and started the updates. A message popped up asking me to encrypt my passphrase, so I told it to proceed. I started typing in my passphrase and noticed that nothing was appearing in the entry box. I tried clicking on it and typing again, but nothing appeared. I figure, well I'll do this later and closed the box. After my updates completed I re-started xubuntu and now it tells me that my password is incorrect. I tried different fragments of the password in case some of the typing went through but didn't appear in the encryption box, but this too was futile.