- Install iperf on Windows - just download, unzip and run iperf.exe.
- Install iperf on Ubuntu:
sudo apt-get install iperf
Iperf supports several options, but generally you would run it on one device as a "server" and another as a "client."
To launch iperf in server mode just enter iperf -s at the terminal. It will report, "Server listening on TCP port 5001. . ."
From another system launch iperf in client mode with iperf -c <server IP>. By default Iperf will run a 10 second test and report amount of data transferred and bandwidth speed.
Note: Iperf can be used to test LAN speeds as well as over the Internet.
Download Iperf and get more information from SourceForge.