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Gunicorn Web Server


Gunicorn, short for Green Unicorn, is a highly popular and robust web server gateway interface (WSGI) server for running Python web applications. Known for its simplicity, efficiency, and scalability, Gunicorn has become a go-to choice for deploying web applications. In this comprehensive guide, we’ll walk you through the process of installing and configuring Gunicorn on Ubuntu.

At the heart of Gunicorn lies a commitment to simplicity, performance, and scalability. Its significance in the Python web development realm cannot be overstated, as it acts as a conduit, bridging the gap between web servers and Python web applications. Gunicorn’s architecture is crafted with an emphasis on asynchronous processing, enabling it to efficiently handle concurrent requests and provide a seamless user experience.


Installing Gunicorn on Ubuntu is a straightforward process. Follow these steps to get Gunicorn up and running on your Ubuntu system.

Update Package Lists

Before installing any new software, it’s a good practice to update the package lists to ensure you are getting the latest versions of available packages. Open a terminal and run:

sudo apt update

Install Gunicorn

Use the following command to install Gunicorn using the Python package manager, pip. If pip is not installed, you can install it by running sudo apt install python3-pip. Once pip is installed, proceed to install Gunicorn

sudo pip3 install gunicorn

Verify the Installation

After completing the installation, you can confirm the successful installation of Gunicorn by checking its version. Run the following command.

gunicorn –version

This command should display the installed Gunicorn version, confirming that the installation was successful.

Test Gunicorn

As a quick test, you can use Gunicorn to serve a simple Python application. Create a sample Python file, for example, app.py with the following content:

def app(environ, start_response):
data = b”Hello, World!\n”
start_response(“200 OK”, [
(“Content-Type”, “text/plain”),
(“Content-Length”, str(len(data)))
return iter([data])

Now, run Gunicorn to serve this application:

gunicorn app:app

This command starts Gunicorn and binds it to the default address and port ( You can access the application by visiting in your web browser.

Running Gunicorn as a Daemon (Optional)

In a production environment, you might want to run Gunicorn as a daemon. To achieve this, use the -D option:

gunicorn -D app:app

This will run Gunicorn in the background as a daemon process.

Congratulations! You have successfully installed Gunicorn on your Ubuntu system. You can now explore further configurations and integrate Gunicorn with your Python web applications for efficient and scalable deployment.

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