iftop does for network usage what [[top]] does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question "why is our ADSL link so slow?".^[https://pdw.ex-parrot.com/iftop/] # Screenshots Standard view, port display off, two lines per host pair  Host names hidden, source port shown, one line per host pair = network traffic by service