Usage: netstat [-ral] [-tuwx] [-en]
Display networking information
-r Routing table -----------------------查看路由表
-a All sockets 所有套接字状态
-l Listening sockets
Else: connected sockets
-t TCP sockets
-u UDP sockets
-w Raw sockets
-x Unix sockets
Else: all socket types
-e Other/more information
-n Don't resolve names
arp -a 显示本地arp表