"Linux Learning Notes" netstat command

Luoluo cow once again showed me his strong Linux ability, now summed up the use of netstat.

First, look at Netstat's man page:

NAME

Netstat-print network connections, routing tables, interface statistics, masquerade connections, and multicast Membershi Ps

As you can see, the netstat command can print network connections, routing tables, interface statistics, camouflage links, and multicast members.

Synopsis

netstat [--all|-a] [--numeric|-n] [--tcp|-t] [--udp|-u] [--listening|-l] [--program|-p] [--statistics|-s] [--help|-h]

Parameter explanation:

NETSTAT-A: Show socket status in all connections and waiting

Netstat-n: When the network state is displayed, the address is represented as a number (as localhost expressed as 127.0.0.1)

Netstat-s: Network statistics by network protocol classification display

NETSTAT-T: Show TCP protocol network status

Netstat-u: Displaying UDP protocol network status

Netstat-p: Show Process Name

Common combinations:

1.netstat-an (Listing all the listening Ports of TCP and UDP connections)

2.netstat-at (Listing only TCP (Transmission control Protocol) port connections using Netstat-at.)

3.netstat-l (Listing all active listening ports connections with netstat-l.)

4.NETSTAT-TP (displaying service name with their PID number, using option NETSTAT-TP would display "Pid/program name".)

Reference:

http://www.tecmint.com/20-netstat-commands-for-linux-network-management/

http://write.blog.csdn.net/postedit/17555445