Linux Command - iperf

The Linux iperf command is a tool used to test network performance.

Install like this on Debian / Ubuntu:



sudo apt install iperf

TCP testing

Start a server:



iperf -s

Start a client ( use your IP ):



iperf -c 198.51.100.5

Start a server:



iperf -s -u

Start a client ( use your IP ):



iperf -c 198.51.100.5 -u

UDP has a 1 Mbit limit in iperf by default. Override this to be above your bandwidth cap:



iperf -c 198.51.100.5 -u -b 1000m

There are a lot more options for this command .