This question already has an answer here:

I thought it would be a good idea to finally take the password off my little netbook since it has never actually been of any use, and has mostly just slowed down . But when I went to change my password, there wasn't even an option to make it blank, and any attempt to make it a few easy characters was met with "Password too weak".

So I did what any good geek would do and popped open the terminal, read the manual entry for passwd and quickly used the -d option to remove the password from my account. It all went well for a couple days (I even managed to also make my keychain password blank) until I tried to update the thing.

My sudoers password is not blank, and it's not my old password. I have no idea what it is. How do I reset it (or even better, make it blank) without the use of the sudo command?

marked as duplicate by Eliah Kagan, Eric Carvalho, Seth, user25656, Thomas Ward Mar 18 '13 at 6:06

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.


Go to terminal type who am i then type passwd and enter the password you want. You will be able to use that password to change your password on user accounts.

  • how can he do that from terminal with out sudo ? – rɑːdʒɑ Oct 14 '12 at 7:11
  • 1
    A user can change his own password without sudo. – Mark Paskal Oct 14 '12 at 7:38

If you messed up your sudoers file, you'll need to:

  • Reboot into recovery mode (hit escape during boot, choose the recovery mode option on the grub screen)
  • Choose the 'Enable networking' option (if you don't your filesystem will be mounted as read-only. who knew)
  • Chosee the 'Drop to root shell' option
  • Run visudo, fix your file
  • Reboot with normal grub option

source :- http://mario.net.au/content/recover-etcsudoers-ubuntu-1204


You can install linux on machine without losing data . only be carefull aboout that use same username . if you want really cracking password i will look for it


After switch on your PC , you will see GRUB menu . In the GRUB menu choose recovery mode and then choose root option . there type this command


Then Give your new password .

then restart.

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