進入源文件進行修改
leafpad /etc/apt/sources.list
（其實系統本身就自帶了更新源，去掉其注釋也是可以的，現在官方源的下載速度也還ok，下面的三選一亦可）
#kali官方源 deb http://http.kali.org/kali kali-rolling main non-free contrib #中科大的源 deb http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib deb http://mirrors.ustc.edu.cn/kali kali-rolling main contrib non-free deb-src http://mirrors.ustc.edu.cn/kali kali-rolling main contrib non-free deb http://mirrors.ustc.edu.cn/kali-security kali-current/updates main contrib non-free deb-src http://mirrors.ustc.edu.cn/kali-security kali-current/updates main contrib non-free #阿里雲源 deb http://mirrors.aliyun.com/kali kali-rolling main non-free contrib deb http://mirrors.aliyun.com/kali-security/ kali-rolling main contrib non-free deb-src http://mirrors.aliyun.com/kali-security/ kali-rolling main contrib non-free
apt-get update
apt-get upgrade（之前錯誤為ape-get upgrade）
apt-get dist-upgrade
apt-get clean