I recently was trying to upload several terabytes of data over to AWS' S3 file storage. Given that inbound transfers to S3 are actually free, this wasn't as pricey as it might seem. The transfer seemed slow so Nick suggested using Bandwidth Monitoring software, an obvious thing, but something I didn't even know existed. The tool Nick recommended was bmon.

Install it as follows:

sudo apt-get install bmon

Start it as follows:

bmon

Here's what you can see:

bmon.png