在linux下实现多人会话。具体功能包括：注册与登录系统，群聊，私聊，在线用户查询，管理员管理账户（踢下线，禁言，提升或降低权限）。-To achieve more than a session in linux. Specific features include: registration and login system, group chat, private chat, online user queries, administrators managed accounts (kicking off the assembly line, gag, raise or lower the privilege).