linux net tools for diagnosing errors in port bindings
When checking for the currently used ports to check for any blockers we can use a
tool called net-tools.
The tool returns a list of currently used port mappings to help diagnose the port that is currently being consumed.
I encountered the need for this when working with a Docker application that required a common port, I was able to find an Apache2 server running on that port mapping that I terminated.
Example usage and installation
sudo apt install net-tools
# returns non-privileged user processes
sudo netstat -pna | grep <your port number>
# returns all processes
sudo netstat -pna | grep <your port number>