Two really useful commands I use for testing if a service is running on a specific port:
You want to simulate running a service on a port (and you don't want to deploy a complete software stack :D ). Use: **nc -k -l 4444**
You want to check that your service is running on port 4444. Use: > > **netstat -na | grep "LISTEN " | grep 4444** > > > > tcp4 0 0 *.4444 *.* LISTEN > >
The output from the command confirms that a service is listening on port 4444.