Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Possible Duplicate:
How do I reset a lost Administrative(root) password?

My question has been previously asked by other users, but has been dismissed by those who answered. I changed the password to blank, but ubuntu still keeps on asking me for authentication every time I open a program and both blank and my old password do not work. I am certain I do remember my old password. I tried changing it in grub but when I go to the console in root and type passwd [my account name] then asks me to type and retype my new password the console does not react to my typing. When I still type my password, assuming it simply just does not show it but it receives it I get an error: token malfunction, password unchanged. Please help, I need my computer for work.

share|improve this question

marked as duplicate by Bruno Pereira, Jorge Castro, htorque, Takkat, James Jan 5 '12 at 20:48

This question was marked as an exact duplicate of an existing question.

You cannot use blank passwords for administrative accounts, you need to reset your password now else you are locked in your system. – Bruno Pereira Dec 26 '11 at 0:15
Use the guide on the link above to reset your password. – Bruno Pereira Dec 26 '11 at 0:15

Don't set the password to blank. Delete it. Do the following as root user.

passwd -d

From the manual

   -d, --delete
       Delete a users password (make it empty). This is a quick way to
       disable a password for an account. It will set the named account
share|improve this answer

Not the answer you're looking for? Browse other questions tagged or ask your own question.