netcat 传输文件
https://segmentfault.com/a/1190000004381918
cat /etc/passwd | nc 192.168.1.11 1234
cat /etc/passwd | nc 192.168.1.11 8888
https://segmentfault.com/a/1190000004381918
cat /etc/passwd | nc 192.168.1.11 1234
cat /etc/passwd | nc 192.168.1.11 8888
