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Couple of hours earlier I installed the drivers of a HP DeskJet 3000, which I found here: http://hplipopensource.com/.

Since that moment I cannot install anything from the Ubuntu Software Centre. It seems that my root password is wrong now. But I haven't changed it! I have no problem log in to my profile, using my ordinary, very first password I have set when I installed Ubuntu, but when I need to use it as a root password, it is simply does not work...

Any ideas how to fix the mess?

Thank you in advance!

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1 Answer

Ubuntu does not have a root password. What your being asked for in software center is your password. Check your caps lock, etc. and try again.

Failing that reset your password from the terminal with passwd

And if that doesn't work, run sudo ls from the terminal and see if your allowed to sudo.

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Hello again, I have tried passwd , it changed my password successfully but the issue still remains. With sudo sl , states the following: *******(name of the user) is not in the sudoers file. This incident will be reported. –  Hristo Dec 5 '12 at 8:57
    
askubuntu.com/questions/70442/… –  coteyr Dec 5 '12 at 11:19
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