Linux Command details: netstat

Function

The Netstat command is used to display various network-related information, such as network connection, route table, interface status, masquerade connection, and multicast members.

The output result can be divided into two parts:

ActiveInternet Connections is called an active TCP connection;

The other is Active UNIX domain sockets, which is called an Active Unix domain socket and can only be used for local communication.

Main Parameters

-A, -- all, -- listening

Show all options. LISTEN is not displayed by default.

-T

Show only tcp-related options

-U

Show udp-related options only

-N

If the alias is not displayed, it can be converted to a number.

-L, -- listening

Only list the service status in LISTEN

-P

Display the program name for establishing the relevant link

-R

Display route information

-E

Show more information

-S

Show statistics

-C, -- continuous

Continuously list information

-I, -- interfaces

Show interface table

-G, -- groups

Show multicast group members

-V, -- verbose

Show Details

-W, -- wide

Show IP addresses without compression

-O, -- timers

Display timer

-C, -- cache

Display route Cache Information

 

Example

List all ports

Netstat-

List all tcp ports

Netstat-

List all udp ports

Netstat-au

List all Sockets in listening status

Netstat-l

Only list all listening UNIX ports

Netstat-lx

Display statistics of all ports

Netstat-s

Display PID and process name in netstat output

Netstat-p

Aliases are not displayed in the output.

Netstat-

Continuous output information

Netstat-c

Display route information

Netstat-r

Display Network Interface list

Netstat-I