leafpad /etc/apt/sources.list

#aliyun 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

# ustc 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
#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

# kali 官方源
deb http://http.kali.org/kali kali-rolling main non-free contrib 
deb-src http://http.kali.org/kali kali-rolling main non-free contrib 

# 默认的，可以注释掉不用管
#deb http://security.kali.org/kali-security kali-rolling/updates main contrib non-free
#deb-src http://security.kali.org/kali-security kali-rolling/updates main contrib non-free

2、更新一下源：

1 apt-get update

3、开始更新软件：

1 ape-get upgrade

4、更新系统：

1 apt-get dist-upgrade

5、清理安装包：

1 apt-get clean
2 apt-get autoclean