Netstat

This quick reference cheat sheet provides various for using netstat command.

#Getting started

#Statistics

All connections on port 80

$ netstat -anp | grep :80

Netstat Help

$ netstat -h

#Listening

Option Example
netstat -ltunp All Listening ports
netstat -ltn Listening TCP ports
netstat -lun Listening UDP ports
netstat -lx Listening Unix ports

#Connections

Option Example
netstat -a All connections
netstat -at All TCP connections
netstat -au All UDP connections

#Statistics

Option Example
netstat -s Display statistics
netstat -st Display TCP statistics
netstat -su Display UDP statistics

#Networks

Option Example
netstat -i Show network interfaces
netstat -ie Show network interfaces extended info

#Routing

Option Example
netstat -r Show routing table
netstat -rn Show routing table, don't resolve hosts