linux下udp客户端程序和可执行文件，亲测，绝对有用。-The udp client program under Linux and executable files, close test, absolutely useful

linux下udp服务器程序和可执行文件，前面已上传了客户端，这里是服务器端-Udp server program under Linux and executable files, has been posted in front of the client, this is the server

串口服务器程序，主机通过网络连接串口服务器，透传从主机传过来的数据，支持tcp server、tcp client、udp-Serial server program, the host server via a network connection port, pass-through from the host pass over the data to support tcp server, tcp client, udp

一个通俗的tcp/udp入门程序，运行在Linux上，实现简单的发送接收，即server和client(A popular tcp/udp entry program, run on Linux, to achieve simple sending and receiving, that is, server and client)