修改源文件
路径：/etc/apt/sources.list
用vi打开
vi /etc/apt/sources.list
推荐使用清华源，稳定
deb http://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling contrib main non-free
deb-src https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free
更新软件源/系统
apt-get update
apt-get dist-upgrade