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I just installed Ubuntu on a new machine and everything seemed to be going fine. I and a coworker were having some issues with a few things and have managed to lock-out a local admin (sudo?) account after unjoining an AD domain using realm while troubleshooting some McAfee issues were were having. I'm 99.9% certain that the password has not changed for the user. I have followed ALL the steps found here for resetting the password as root in recovery. When I try to run

sudo passwd USERNAME

I get the error:

root@hostname:~# sudo passwd USERNAME passwd:Permission denied passwd:password unchanged root@hostname:~#

When I try to do the steps for the "The Drastic Measures", I notice that the shadow file does not show what would usually indicate an encrypted password for the user. Instead it looks like:

username:!:14920:0:99999:7:::

I have removed the exclamation point and still have issues. Even when I run

passwd

as root through recovery, I get a permissions denied error. As it stands right now, I can only log into the machine as root through recovery. I'm at a complete loss at this point and trying to avoid breaking down the machine and starting from scratch. Any help you guys can provide would be greatly appreciated.

Community
  • 1
ProAm500
  • 21

1 Answers1

0

Sol:

vi /etc/pam.d/common-password
password        [success=3 default=ignore]      
pam_unix.so obscure sha512

=> Change it to "success=2"

Smile!

PerlDuck
  • 13,885
Gyanesh
  • 1