接收方开端口3389,将接收文件保存为jdk-7u40-linux-x64.gz
nc -l 3389 > jdk-7u40-linux-x64.gz
发送方写上接收方的外网ip,端口号与接收方保持一致,最后接要发送的文件
nc 101.6.25.22 3389 < /Volumes/PENDRIVE/jdk-7u40-linux-x64.gz
http://blog.csdn.net/michael493439861/article/details/7445454
查看一台机器端口开放情况
nc -z 192.168.1.1 80
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