How to send only one UDP packet with netcat?

Question

I want to send only one short value in a UDP packet, but running the command

echo -n \"hello\" | nc -4u localhost 8000

I can see that the serve

Answer 1

I had the same problem but I use -w 0 option to send only one packet and quit. You should use this command :

echo -n "hello" | nc -4u -w0 localhost 8000