首先就是修改软件源文件
/etc/apt/sources.list
可以用leafpad打开，在终端中键入：
leafpad /etc/apt/sources.list
原码是kali官方的软件源，更换国内软件源的话，在速度上可能会快一些。下面我放上一些主流国内的源。
用法：直接复制到source.list 里面，记得把官方源前面加#，用那个源，就把它前面的#去掉。
#阿里云 Kali源
deb http://mirrors.aliyun.com/kali kali main non-free contrib
deb-src http://mirrors.aliyun.com/kali kali main non-free contrib
eb http://mirrors.aliyun.com/kali-security kali/updates main contrib non-free
中科大kali源
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
#浙江大学 Kali源
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
#东软大学 Kali源
deb http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
deb-src http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
#重庆大学 Kali源
deb http://http.kali.org/kali kali-rolling main non-free contrib
deb-src http://http.kali.org/kali kali-rolling main non-free contrib
#官方Kali源
#deb http://http.kali.org/kali kali-rolling main non-free contrib
#deb-src http://http.kali.org/kali kali-rolling main non-free contrib
#清华大学kali源
deb http://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
deb-src http://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free