how to open tcp port in ubuntu

Question

I have a ubuntu server

How can i open a port ?

I have flushed the iptables and off'ed ufw

Provide me steps how to open a tcp port

Answer 1

Your question is overly vague and probably insufficient to help you do what you're actually trying to do, but if you just want to open a port you can do it like so:

nc -l -p PORT_NUMBER

You can then pass data received on that port to a script by doing:

nc -l -p PORT_NUMBER | SCRIPT