A guide to iperf (network metering)

Both for my work and private tinkering I often have the need to do bandwith tests over a network connection. Sometimes it's troubleshooting ethernet connections up to 10Gbit, sometimes it's testing an internet line, a WiFi link or actual real-world VPN throughput potential. Whatever the case I often need a good mutli-platform bandwith testing tool.

For this I use a program called "iperf" and while it can be a bit daunting at first with a little know-how it's actually pretty easy! Read on to find out how to use it in a variety of situations: 

A perfect Gigabit connection