由于kali的更新源是国外网站，替换成国内的镜像站，具体操作如下： 

打开终端输入 leafpad /etc/apt/sources.list   把下面的源粘贴进去,原有内容注释掉

#中科大源

deb http://mirrors.ustc.edu.cn/kali sana main non-free contrib  

deb-src http://mirrors.ustc.edu.cn/kali sana main non-free contrib  

deb http://mirrors.ustc.edu.cn/kali-security/ sana/updates main contrib non-free  

deb-src http://mirrors.ustc.edu.cn/kali-security/ sana/updates main contrib non-free

#阿里云kali源

deb http://mirrors.aliyun.com/kali sana main non-free contrib

deb http://mirrors.aliyun.com/kali-security/ sana/updates main contrib non-free

deb-src http://mirrors.aliyun.com/kali-security/ sana/updates main contrib non-free