1. 什么是镜像源

        镜像源一种数据存储和分发技术，通常指的是一个服务器或网站，它存储了另一个服务器或网站上的某些或全部内容的副本。

2. kali更新镜像源

        1. 编辑镜像源文件

    vi /etc/apt/sources.list 

        2. 将原来的镜像源用#号注释掉

        3. 选择镜像源地址粘贴进去

	#中科大其他镜像deb http://mirrors.ustc.edu.cn/debian/ buster main contrib non-freedeb http://mirrors.ustc.edu.cn/debian/ buster-updates main contrib non-freedeb http://mirrors.ustc.edu.cn/debian/ buster-backports main contrib non-freedeb http://mirrors.ustc.edu.cn/debian-security buster/updates main contrib non-free#中科大deb http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contribdeb-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 contribdeb-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 non-free contribdeb-src http://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main non-free contrib#官方源deb http://http.kali.org/kali kali-rolling main non-free contribdeb-src http://http.kali.org/kali kali-rolling main non-free contrib#浙大(不稳定)deb http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-freedeb-src http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free#东软大学deb http://mirrors.neusoft.edu.cn/kali kali-rolling main non-free contribdeb-src http://mirrors.neusoft.edu.cn/kali kali-rolling main non-free contrib

        4. 保存退出按Esc按键输入:wq

:wq

        

        5.更新系统和软件

apt-get update && apt-get upgrade