1、打开终端：
vim /etc/apt/sources.list
2、注释掉自带的官方源，添加中科大源：
deb http://mirrors.ustc.edu.cn/kali kali main non-free contrib
deb-src http://mirrors.ustc.edu.cn/kali kali main non-freecontrib
deb http://mirrors.ustc.edu.cn/kali-security kali/updates maincontrib non-free
