leafpad /etc/apt/sources.list

#阿里云

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

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

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

#中科大 

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

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

    apt-get dist-upgrade

    apt-get update & apt-get upgrade

    apt-get clean