Iproute2是一个在Linux下的高级网络管理工具软件，在linux中使用虚拟网卡时会用到这个工具，很强大。-Iproute2 is an advanced network management tools in Linux, and will use this tool when using the virtual NIC in linux, it is very powerful.

tun驱动程序实现了虚拟网卡的功能，利用tun驱动可以实现linux 下虚拟网卡的创建与管理。-tun/tap driver implements a virtual NIC functionality, tun represents a virtual point to point device, tap represents a virtual Ethernet devices, both devices for network packet implement different pack