IT/Software/Command Line Applications/iperf3
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General
Install
sudo apt install iperf3
Usage
Server
This is the computer that will listen for requests for speed checks.
Options
-1 is great as it allows for one check from a remote client and then exits the program
Client
This is the computer that will try to dial into the server to test their communication speed
Options
-V tell you more
-t 5 will only check five times. Usually enough
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.