Listening with nc:

nc -l 8089

Checking that 8089 port is listening:

netstat -nap|grep 8089
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 0.0.0.0:8089 0.0.0.0:* LISTEN 27543/nc
tcp 0 0 127.0.0.1:8089 127.0.0.1:43592 TIME_WAIT -

Sending data to 8089 port:

telnet localhost 8089
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
hello