Updating to kde-4.4.2 from kde-4.3.3

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Invalidmagic posted a guide on how to updating from KDE 4.3.3 to 4.4.2 on Gentoo Linux
i'm not a big fan of updates but sometimes i have to do them. this time i would like to blog the steps so that other gentoo users can review my doings. this posting lists all commands i’ve issues in order to update from kde-4.3.3 to kde-4.4.2 (later kde-4.4.3)

>> Updating to kde-4.4.2 from kde-4.3.3