I can log in with my password just fine, but when trying to use sudo to run commands or authenticating to install software, my password does not work and my account is an administrator account. Further more, when I try to change my password with "passwd" in recovery mode, I get "Authentication token manipulation error." I've just installed 12.04, so I'm not sure what I could've done to break the system.

closed as off-topic by WinEunuuchs2Unix, Fabby, waltinator, Yaron, Pilot6 Jul 23 '17 at 8:48

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This describes a problem that can't be reproduced that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers." – WinEunuuchs2Unix, Fabby, waltinator, Yaron, Pilot6
If this question can be reworded to fit the rules in the help center, please edit the question.

  • Related: askubuntu.com/questions/152793/… – Eliah Kagan Jun 19 '12 at 1:10
  • Are you able to run commands as root using pkexec instead of sudo? (You can try a harmless command like pkexec ls to see.) If so, what happen when you try to change your password using pkexec passwd $USER. [I'm posting this as a comment rather than an answer because it's more likely to reveal useful diagnostic information, than to actually solve the problem.] You can edit your question to add this information. (Unless it solves the problem; then comment about that and I'll repost this as an answer. But that will probably not happen, not quite yet.) – Eliah Kagan Jun 22 '12 at 3:16
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    OP hasn't signed on in 5+ years to respond to comments. This question is about EOL version and doesn't have any answers. As such VTC as not reproducible – WinEunuuchs2Unix Jul 22 '17 at 18:02