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Possible Duplicate:
How can you remove Unity?

How to fully remove Unity Desktop Environment and associated files and dependencies from Ubuntu 12.04 and have a pure KDE installation ?

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marked as duplicate by Uri Herrera, Mitch, izx, con-f-use, RobotHumans Aug 27 '12 at 13:40

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
'a pure KDE installation' like any other "pure" stuff is 90% a temptation that should not receive excessive credit. Ubuntu is always Ubuntu no matter the DE, except if your main concern is limiting the use of resources. Just install kubuntu-desktop and do not bother about the presence of Unity. But if you really want a pure and hard KDE, make a complete new Kubuntu install from a cd/usb – cipricus Aug 27 '12 at 13:14

From the terminal: sudo apt-get remove unity* and then sudo apt-get autoremove so nothing stays, then proceed to Install KDE sudo apt-get install kubuntu-desktop.

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