1. apt-get update && apt-get upgrade && apt-get clean
    #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-rolling main non-free contrib

#阿里云
deb http://mirrors.aliyun.com/kali kali-rolling main non-free contrib
deb-src http://mirrors.aliyun.com/kali kali-rolling main non-free contrib

#清华大学
deb http://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free

#浙大
deb http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free
deb-src http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free