Networking
iperf3
Network bandwidth test tool.
Ubuntu
Debian
Arch
Fedora
Verified: 2026-05-10
Syntax
$iperf3 [OPTIONS]
Examples
$iperf3 -s
$iperf3 -c server
$iperf3 -c server -P 4
Typical use cases
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Standard usage
iperf3 --help
Note
Measures network bandwidth between client and server.
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