Using Netstat in Linux

1 Features:

Displays information about the local network connection, the running port, and the routing table.

2 Common options

-A: Displays all connections and listening ports on this machine

-N: The network IP address displays the currently established valid connection and port

-R: Show routing table information

-S: Show statistics by protocol

-V: Displays the currently active connection

-T: Display of all TCP protocol connections

-U: Show all UDP connection conditions

-i:xianshi automatic configuration of port status

-L: Only show connection status bit Listen service network status

3 Upper Option Test

　　(1) NETSTAT-RN------> Display current system routing information

　(2) NETSTAT-TN display the current TCP connection

　　

　　(3) Netstat-tlnpu------------> Displays the network connections and corresponding port information that have been initiated in the current system

　　

(4) NETSTAT-ATUNP display resource information in the connected state

　　

Using Netstat in Linux