说明：  在Unix/Linux环境下，用Client/Server结构实现；支持多个客户之间的相互交流（公聊，用户名）； 工作方式： 服务器程序先在后台运行； 客户端程序通过“网址+端口号”连接到服务器，并根据提示输入用户名（不需验证）；
(On Unix/Linux environment, using Client/Server architecture to achieve support interaction between multiple customers (the public chat, user name) work: first, the server program running in the background client through the " Web+ port " Connect to the server, and follow the prompts to enter a user name (without verification) )