CLI Speed Test: Analyze Net Connection with Command-Line Tools

In today’s digital age, a fast and reliable internet connection is essential for both personal and professional use. Whether you’re a casual internet user, a content creator, or a network administrator, it’s crucial to determine the speed and stability of your internet connection.

While there are various online speed test tools available, CLI (Command-Line Interface) speed tests provide a convenient and efficient way to analyze your internet connection directly from your computer’s terminal.

In this article, we will explore the concept of CLI speed tests, their benefits, and how to conduct one on your own.

CLI Speed Test is a command-line interface tool that allows you to test your internet speed from the terminal. It is a useful tool for network administrators, developers, and anyone who wants to check their internet speed without opening a web browser.


In this digital era, where everything is interconnected, a stable and fast internet connection is vital. CLI speed tests allow you to measure the speed and quality of your internet connection through simple command-line tools.

By understanding your internet’s performance, you can troubleshoot issues, optimize your network, and ensure a seamless online experience.

What is a CLI Speed Test?

A CLI speed test is a method of measuring the speed and latency of an internet connection using command-line tools.

Unlike web-based speed tests that rely on browser performance, CLI speed tests directly interact with your operating system’s networking components, providing more accurate and reliable results.

These tests evaluate various metrics such as download speed, upload speed, ping latency, and jitter to give you a comprehensive overview of your internet connection’s performance.

Advantages of CLI Speed Tests

CLI speed tests offer several advantages over traditional web-based speed tests. Let’s explore some of them:

  • Efficiency: CLI speed tests can be performed quickly directly from your terminal without the need to open a web browser or visit a specific website.
  • Accuracy: Since CLI speed tests interact directly with your operating system’s networking components, they provide more accurate and reliable results.
  • Flexibility: CLI speed tests offer more customization options, allowing you to tailor the test parameters to match your specific requirements.
  • Automation: CLI speed tests can be automated, enabling you to schedule regular tests or integrate them into scripts for network monitoring purposes.

How to Perform a CLI Speed Test

Performing a CLI speed test is a straightforward process. Let’s go through the steps required to conduct a speed test using command-line tools:

Step 1: Opening the Terminal

To initiate a CLI speed test, open the terminal or command prompt on your operating system. The process may vary depending on whether you are using Windows, macOS, or Linux.

Step 2: Choosing a CLI Speed Test Tool

When it comes to choosing a CLI speed test tool, you have several popular options available for measuring your internet connection’s performance. Let’s explore some notable tools:

  • Speedtest-cli: Developed by Ookla, the creators of, Speedtest-cli is a widely used command-line tool for conducting speed tests. It provides accurate results by connecting to’s servers and measuring your connection’s download and upload speeds, as well as ping latency.
  • Fast: Fast is a command-line tool designed to provide quick and accurate speed test results. It offers a simple interface and utilizes Netflix’s servers to measure your connection’s speed. Fast also displays additional metrics such as packet loss and server latency.
  • Librespeed: Librespeed is an open-source CLI speed test tool that allows you to test your internet connection’s speed without relying on external servers. It provides a self-hosted solution, giving you full control over the testing environment and ensuring privacy.
  • Nuttcp: Nuttcp is a command-line tool used for network performance testing. It allows you to measure the throughput and latency of your connection by transferring data between two endpoints. Nuttcp offers advanced options for customizing the test parameters to suit your specific needs.
  • Iperf: Iperf is another versatile command-line tool for network performance testing. It enables you to measure the bandwidth and quality of your connection by generating TCP and UDP data streams. Iperf provides detailed statistics and supports various testing modes for comprehensive analysis.

Step 3: Executing the Speed Test

Once you have chosen a CLI speed test tool, execute the command in your terminal to start the speed test. The tool will perform various measurements, such as downloading and uploading data to remote servers, and calculate the corresponding metrics. The results will be displayed in the terminal after the test completes.

Interpreting the Speed Test Results

After running the CLI speed test, you will receive a set of results that provide valuable insights into your internet connection’s performance. Here are some key metrics you may encounter:

  • Download Speed: This metric represents the rate at which data can be downloaded from the internet to your device, typically measured in megabits per second (Mbps).
  • Upload Speed: Similar to download speed, upload speed measures the rate at which data can be uploaded from your device to the internet.
  • Ping Latency: Ping latency measures the time it takes for a signal to travel from your device to a remote server and back. Lower latency values indicate a more responsive connection.
  • Jitter: Jitter refers to the variation in ping latency over time. Lower jitter values indicate a more stable and consistent connection.

By analyzing these results, you can identify potential issues, such as slow speeds, high latency, or inconsistent performance, and take appropriate measures to address them.

SPEEDTEST® CLI: Measure Your Internet Connection with Power and Ease!

Are you a developer, system administrator, or computer enthusiast looking to analyze your internet connection? Look no further! SPEEDTEST CLI brings the trusted technology and global server network of Speedtest to the command line, providing you with precise measurements and insights.


  1. Native Command Line Experience: Say goodbye to relying on web browsers. With SPEEDTEST CLI, you can measure download speed, upload speed, latency, and packet loss directly from your command line, effortlessly and efficiently.
  2. Linux-Native Application: SPEEDTEST CLI is the first official Linux-native Speedtest application backed by Ookla®, ensuring reliable and accurate results for your Linux desktop, remote servers, or even lower-powered devices like the Raspberry Pi®.
  3. Automated Testing: Set up automated scripts to collect connection performance data over time. Track trends, identify issues, and make data-driven decisions to optimize your network.
  4. Seamless Integration: Incorporate Speedtest into your programs by wrapping it in your preferred programming language. Harness the power of Speedtest within your own applications.
  5. Versatile Test Result Formats: View your test results in a way that suits your needs. Choose from CSV, JSONL, or JSON formats for easy analysis and integration with other tools.

Ready to get started? Install SPEEDTEST CLI now!

Install Options:

  • macOS
  • Ubuntu/Debian
  • Fedora/Centos/Redhat
  • FreeBSD

Experience the speed and precision of SPEEDTEST CLI as you uncover the true potential of your internet connection. Take command and gain valuable insights today!

Factors Affecting Internet Speed

Several factors can impact your internet speed and overall connection quality. Understanding these factors can help you diagnose and resolve any issues you may encounter. Here are some common factors:

1) Internet Service Provider (ISP)

Your internet service provider plays a significant role in determining the speed and stability of your connection. Different ISPs offer varying levels of service quality, and factors such as network infrastructure and the type of internet connection can influence your experience.

2) Network Congestion

During peak usage periods, network congestion can occur, resulting in slower speeds and higher latency. Congestion can happen within your local network or within your ISP’s network infrastructure.

3) Hardware and Equipment

The quality and condition of your networking hardware, such as routers, modems, and cables, can impact your internet speed. Outdated or faulty equipment may hinder the performance of your connection.

Tips to Improve Internet Speed

If you’re experiencing slow internet speeds, there are several steps you can take to optimize your connection. Here are some tips:

  • Upgrade Your Internet Plan: Consider upgrading to a higher-speed plan offered by your ISP if your current plan no longer meets your needs.
  • Optimize Router Placement: Place your router in a central location, away from obstructions, for better coverage and signal strength.
  • Secure Your Network: Protect your Wi-Fi network with a strong password to prevent unauthorized access, which can negatively impact your connection.
  • Reduce Interference: Minimize interference from other electronic devices by keeping your router away from sources of potential interference, such as microwaves or cordless phones.

Final Words from Testing Net Speed

CLI speed tests provide a convenient and efficient way to evaluate your internet connection’s speed and quality. By utilizing command-line tools, you can obtain accurate and reliable measurements directly from your terminal.

Understanding your internet’s performance can help you troubleshoot issues, optimize your network setup, and ensure a seamless online experience.

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Frequently Asked Questions and Answers

Q1. Are CLI speed tests accurate?
Yes, CLI speed tests are generally more accurate compared to web-based speed tests as they interact directly with your operating system’s networking components.

Q2. Can I automate CLI speed tests?
Yes, CLI speed tests can be automated, allowing you to schedule regular tests or integrate them into network monitoring scripts.

Q3. Are CLI speed tests compatible with all operating systems?
CLI speed test tools are typically compatible with Windows, macOS, and Linux operating systems.

Q4. How often should I perform CLI speed tests?
Performing speed tests periodically or when you suspect issues can help you identify any fluctuations or changes in your internet connection’s performance.

Q5. Can CLI speed tests help troubleshoot internet connectivity problems?
Yes, CLI speed tests can provide insights into potential issues such as slow speeds, high latency, or inconsistent performance, aiding in troubleshooting efforts.