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How do I reset a lost administrative password?

I am running Ubuntu 12.10 and have removed the password on my account. When I need to Authenticate, the system doesn't accept a blank box. How do I authenticate then?

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marked as duplicate by Alvar, Uri Herrera, Salem, Ringtail, RobotHumans Dec 31 '12 at 3:57

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Have you tried using the old password you removed? – James Dec 30 '12 at 21:54
Tried putting the password back on? – den4uk Dec 30 '12 at 21:56
Did you try to reset your password with recovery mode? Here's a pretty nice how-to: – user117730 Dec 30 '12 at 21:58

Open a terminal (CTRL+ALT+T) and run this command


Set a new password and it should be fine.

You cannot "work" in Ubuntu without a password. You can autologin if you want , but no password at all , no.

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