# 5.31 nmap 端口扫描
建议：`sudo apt install nmap`           
例如扫描指定UDP端口：`sudo nmap -p 9902 -sU 10.35.99.100`       
反馈举例：`9902/udp open|filtered unknown`      
扫描TCP端口举例：`sudo nmap -p 9903 -sT 10.35.99.100`