原 nc在centos7上的安装和简单使用

https://blog.csdn.net/qq_16414307/article/details/50291341

https://www.cnblogs.com/rocky-AGE-24/p/6979981.html

https://blog.csdn.net/soshow2011/article/details/79106820

https://blog.csdn.net/jiujiu372/article/details/73533367

https://blog.csdn.net/kobejayandy/article/details/13792265

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