# 端口扫描 nc -z -v -n 127.0.0.1 21-25 # 使用netcat 连接服务抓取他们的banner nc -v 127.0.0.1 9999 # 聊天 $nc -l 3000 # server $nc 127.0.0.1 3000 # client # 文件传输 $nc -l 3000 < file.txt # server $nc -n 127.0.0.1 3000 > file.txt # client
