QUnix Socket Server Private for Linux.

本代码是基于windows下的socket编程，主要功能是实现从服务器端到客户端的文件传输，比较简单，适合初学者学习-The code is based on socket programming under windows, the main function is to achieve the transfer of files from the server to the client, is relatively simple, suitable for beginners to lea

communication client/server socket according to udp and tcp