IT/Software/Command Line Applications/iperf3

Install

sudo apt install iperf3

Usage

Server

This is the computer that will listen for requests for speed checks.

Client

This is the computer that will try to dial into the server to test their communication speed

Checking speed

On the server you need to start listening

iperf3 -s

On the client you need to send the request

iperf3 -c ipAddressOfServer

NOTE: If the server is on a dynamic ip and or behind a router that does not have the port forwarded then you will need zerotier setup to get to the listening computer.