本书讲述了用于网络及Internet的各种UNIX工具。本书为每个邮件程序、新闻阅读器和Internet应用的命令、选项及特性提供了简捷的图表示意，使读者非常易于深入掌握各种Unix网络应用技术。-This book about the network and the Internet for a variety of UNIX tools. Book for each mail program, news reader and Internet applications, orders, options and features provide a simple chart signal, so that readers are very easy to grasp a variety of Unix network application technology.