模拟LINUX下的pos机系统的客户端,服务器端稍后再上传-simulation under the pos LINUX System client, server later upload

realize RPC in linux system to open, read, write a file in the client side and operate file indeed in the server side

在Linux下，实现两个终端间的通信，一个作为服务端，一个我作为客户端，实现学生信息的查询，修改，排序-Under Linux, to achieve communication between the two terminals, one as a server, I, as a client to achieve student information query, modify, sort