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I know my administrative and account password. But, whenever I try to change it or do anything like connecting to wifi, connecting to a new internet connection whether it be wired or a mobile network, or anything work, my Ubuntu 12.04 ( Which I have been using since 2012) is showing this message for a few days, I will be highly grateful if someone tells me how to solve this , I deadly need to connect wifi at least. This Pic

programking
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Myshkin
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  • Click on "Details" to display details, then post what's in there. – Jan Sep 20 '14 at 13:30
  • If you haven't set root password set it using sudo passwd root – g_p Sep 20 '14 at 13:30
  • see http://askubuntu.com/questions/189907/what-is-the-default-root-password?rq=1 – αғsнιη Sep 20 '14 at 13:48
  • My guess is your administrative account has somehow lost its administrative power, or your system is otherwise similarly misconfigured. In a Terminal (Ctrl+Alt+T), what's the output of groups? And are you able to run a command as root with sudo--for example, what happens when you run sudo echo success? And can you run a command as root with pkexec? Try pkexec echo success too. For the PolicyKit authentication dialog to ask you for root's password is extremely strange on Ubuntu. This deserves to be investigated and properly fixed. – Eliah Kagan Sep 21 '14 at 03:23
  • In short, the more relevant question here is probably "why am I being asked for a root password". If you account has sudo access, you should normally just be asked for your own password. – thomasrutter Sep 21 '14 at 04:00

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