How to Test Your Internet Speed on Linux with Speedtest‑CLI
This guide explains why traditional Speedtest.net requires a graphical interface, introduces the command‑line tool speedtest‑cli, and provides step‑by‑step instructions for installing it on Linux, running basic tests, sharing results, listing servers, and selecting specific servers for precise bandwidth measurements.
Why use speedtest-cli?
When you notice a slowdown in internet speed, you usually test the connection between your computer and the ISP ("last mile") using websites like Speedtest.net. However, Speedtest.net relies on JavaScript and a graphical interface, which is unavailable when you are logged into a server via SSH or using a headless OS.
Installing speedtest-cli
speedtest-cli is a lightweight command‑line tool written in Python that works with Python 2.4‑3.4. It uses Speedtest.net’s infrastructure to measure upload and download rates. Installation is straightforward: download the Python script and run it.
Running a basic test
Simply execute speedtest-cli without any arguments. The tool automatically finds the nearest Speedtest.net server, performs the test, and prints the upload and download speeds.
Sharing results
Use the --share option to upload the result to Speedtest.net and obtain a shareable image.
Listing and selecting servers
The --list option displays all available Speedtest.net servers sorted by distance, each with an ID. To test against a specific server, append its ID to the command, e.g., speedtest-cli --server 935 for a server in Washington DC.
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