Install KDE 4.12 SC(Software Compilation) in Ubuntu 13.10 Saucy/Ubuntu 12.04 Precise/Linux Mint 16/13 and KDE 4.11.3 in Ubuntu 13.04 Raring/Ubuntu 12.10 Quantal/Linux Mint 15/14/ and other Ubuntu derivatives

KDE is an international team co-operating on development and distribution of Free, Open Source Software for desktop and portable computing. Our community has developed a wide variety of applications for communication, work, education and entertainment. We have a strong focus on finding innovative solutions to old and new problems, creating a vibrant, open atmosphere for experimentation.
The KDE Community is proud to announce the latest major updates to KDE Applications delivering new features and fixes. With the Plasma Workspaces and the KDE Platform frozen and receiving only long term support, those teams are focused on the technical transition to Frameworks 5. The upgrade in the version number for the Platform is merely for the convenience of packaging. All bug fixes and minor features developed since the release of Plasma Workspaces, Applications and Platform 4.11 have been included.
KDE basic functionality improved with a smoother taskbar, better sound mixer and smart battery widget. PIM stack received important changes and kate improved productivity of Javascript and Python developers with new plugins. Dolphin became faster and the educational applications bring various new features.
KDE Applications 4.12 Bring Huge Step Forward in Personal Information Management and Improvements All Over and KDE Platform 4.12 Becomes More Stable.
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To install KDE in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

If you already have KDE then enter following commands to upgrade:
That's it
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