kali-2017安裝更新源和vmtools安裝

一些更新源：緩存#auto deb http://http.kali.org/kali kali-rolling main non-free contrib #中科大 deb http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib deb-src http://mirrors.ustc.edu.cn/kali kali-

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