1.uname -a :查看软件版本
kali@kali:~$ uname -a Linux kali 5.4.0-kali4-amd64 #1 SMP Debian 5.4.19-1kali1 (2020-02-17) x86_64 GNU/Linux
2.查看和更换软件源：vim /etc/apt/sources.list
kali@kali:~$ vim /etc/apt/sources.list
3.更新软件：apt update
root@kali:~# apt update
原文：https://www.cnblogs.com/jingzaixin/p/12671675.html