Install darkstat by entering the following commands in the terminal:
sudo apt update sudo apt install darkstat
network traffic analyzer
It is a packet sniffer which runs as a background process and serves its statistics to a web browser: - input and output IP traffic by machines, ports and protocols, - last minute, hourly, daily and monthly global input and output graphics. . It is known to be smaller (in terms of memory footprint) and stabler than ntop.