netcat的是一个简单的Unix工具读取和写入数据通过网络连接，使用TCP或UDP协议。

它被设计成一个可靠的“后端”工具，直接使用，很容易被其他驱动程序和脚本。同时，它是一个功能丰富的网络调试和探测工具，因为它可以创建几乎任何类型的连接你需要并且有几个有趣的内置功能。

-netcat is a simple Unix tools to read and write data over a network connection, using TCP or UDP protocol. It is designed as a reliable " back-end"　tool, direct use, it is easy to be other drivers and scr ipts. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any type of connection you need and has several interesting built-in functions.