说明：  最新版的Linux平台网络抓包工具，支持多种网络协议和过滤规则，如功能全面，支持多种协议，如icmp、arp、rarp、udp、tcp等。文档对如果移植到嵌入式linux做了详细说明，已经测试通过，对嵌入式网络开发人员来说是必不可少的工具。
(The latest version of the Linux platform network packet capture tool, supports multiple network protocols and filtering rules, and full-featured, such as icmp, arp, rarp, udp, tcp, etc.. Documents on embedded linux, if transplanted to a detailed description, have been tested, the developer of the embedded network is an essential tool.)