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Thread: su: Authentication failure

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  1. #1
    Join Date
    Jul 2012
    Beans
    2

    su: Authentication failure

    Hi i'm new on this, I got Kubuntu 12.04 recently installed

    I try to access as a super user but it says "su: Authentication failure" and i know the password is right because i used it before (i use it when the computer hibernates)

    thanks

  2. #2
    Join Date
    Sep 2009
    Location
    Freiburg/Germany
    Beans
    1,112
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: su: Authentication failure

    Ubuntu doesn't set a valid password for root so you can't use su. Use sudo instead.
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  3. #3
    Join Date
    Aug 2012
    Beans
    5

    Re: su: Authentication failure

    Try sudo su. It worked for me.

  4. #4
    Join Date
    Apr 2008
    Location
    LOCATION=/dev/random
    Beans
    5,767
    Distro
    Ubuntu Development Release

    Re: su: Authentication failure

    Quote Originally Posted by E5C4P3 View Post
    Try sudo su. It worked for me.
    You shouldn't use 'sudo su', instead the recommended method is to do:
    Code:
    sudo -i
    Cheesemill

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