Linux Administration Cookbook

iftop

This is the first of the tools in this recipe that's unlikely to be installed by default; we sometimes come to iftop during the troubleshooting process because it's great for visualization. Humans tend to like visualization. We're simple creatures with simple dreams, and those dreams are generally vivid in color, and feature confusing graphs and charts (if you're me). 

As a result, where a computer prefers strings and structure, we tend to like a good representation of what it is we're looking at, and iftop gives us this:

$ sudo iftop

We've generated a bit of traffic here, to three different locations, to show how easy it can be to see different sources and communication:

We went into iftop a lot earlier in this book, but remember ...