net 网络工具包。有ifconfig，netstat，route命令源码。研究源码很有意义！-net network toolkit. Have ifconfig, netstat, route command source. Of source makes sense!

linux下网络工具套件，包括arp,hostname,适合于嵌入式系统。-The Net-tools package is a collection of programs for controlling the network subsystem of the Linux kernel.