How to set up web-based network traffic monitoring system on Linux

When you are tasked with monitoring network traffic on the local network, you can consider many different options to do it, depending on the scale/traffic of the local network, monitoring platforms/interface, types of backend database, etc. ntopng is an open-source (GPLv3) network traffic monitor which provides a web interface for real-time network traffic monitoring. In this tutorial, I will describe how to set up a web-based network traffic monitoring system on Linux by using ntopng.