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I cannot open Ubuntu Software Center, Synaptic Package Manager or install any updates. Below is what I get;

An error occurred, please run Package Manager from the right -click 
menu or apt get in a terminal to see what wrong. The error message was
' Unknown Error: '<type ' exceptions . System Error '> CE: The package
language – pack – kde – en- base- needs to be reinstalled, but I can't
find  an archive for it)' This usually means that you installed
packages have unmet dependencies.

How can I get it fixed? How am I suppose to do this using terminal?

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Open a terminal and enter sudo apt-get install -f enter your password. Edit your question to include the output. – Warren Hill Sep 19 '13 at 12:35

Try sudo apt-get purge packagename --> Where packagename is the application you've installed. This should remove the application.

Then, try sudo apt-get autoremove --> This should remove all the unused dependencies.

Finally, try sudo apt-get install packagename --> Installs the required package.

Hope that helps. :)

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