2.按键盘A进行对更新源的输入；
3.常见的更新源如下：
3.1中科大
deb http://mirrors./kali kali-rolling main non-free contrib
deb-src http://mirrors./kali kali-rolling main non-free contrib
3.2阿里云
deb /kali kali-rolling main non-free contrib
deb-src /kali kali-rolling main non-free contrib
3.3清华大学
deb http://mirrors.tuna./kali kali-rolling main contrib non-free
deb-src https://mirrors.tuna./kali kali-rolling main contrib non-free
3.4浙大
deb http://mirrors./kali kali-rolling main contrib non-free
deb-src http://mirrors./kali kali-rolling main contrib non-free
3.5东软大学
deb http://mirrors./kali kali-rolling/main non-free contrib
deb-src http://mirrors./kali kali-rolling/main non-free contrib
3.6官方源
deb /kali kali-rolling main non-free contrib
deb-src/kali kali-rolling main non-free contrib
4.退出并保存
按Esc退出编辑，然后输入->“:set noreadonly”，然后回车
再输入->“:wq”，按回车退出
至此，kali更新源以添加成功。
5.在命令窗口输入： apt-get update #取回更新软件包列表
apt-get upgrade #进行一次升级
apt-get clean#删除已经下载的安装包
reboot #重启
