Learn Netstat

A basic Linux network command

NETSTAT

• Prints the network connection and routing tables.
• Like an CCTV monitor for every connection come in and go out from your machine.
• MiniManual

• netstat -ant : a for all connection, n for numeric, t for all TCP connection//u for the UDP connection
• netstat -rnec :r for the route information, n numeric, e extend, c continous prints the result
• netstat -stuw : s for statistics summary,t/u for tcp/udp, w prints raw data
• netstat -tulpn : it shows the connectio with PID numbers
• lsof -i : it establish the connection