Author: Rahul

In today’s IT environment, the quest for efficient and scalable software deployment strategies has led to the rise of two dominant technologies: virtualization and containerization. Both allow multiple operating systems and applications to run on a single physical server, but they do so in distinctly different ways. Here’s a deep dive into both technologies, comparing their advantages, disadvantages, and best-use cases. 1. What is Virtualization? Virtualization involves creating multiple virtual instances of a computer (virtual machines, or VMs) on a single physical server. Each VM has its operating system (OS), a full copy of an OS, and is allocated a…

FastAPI is a modern tool built with Python that helps you create backend APIs. To use the latest version of FastAPI, your computer needs to have at least version 3.8 of Python installed. Like many other frameworks, FastAPI can work with environment variables, which are a great way to manage settings separately from your code. This makes your application easier to manage and more secure. In this article, we’ll look at how to use .env files in your FastAPI application. These files are where you can store configuration settings, keeping them separate from your main application code. Why use a…

Apache’s mod_rewrite is one of the most powerful modules available for URL manipulation. With mod_rewrite, you can redirect URLs, rewrite URLs to make them cleaner, and much more. It is particularly useful for implementing SEO-friendly URL structures on your website. In this article, we will walk you through how to enable mod_rewrite in Apache on both Debian-based and RHEL-based systems. 1. Check if mod_rewrite is Already Enabled Before enabling mod_rewrite, it’s a good idea to check if it’s already active: apache2ctl -M | grep rewrite OR httpd -M | grep rewrite If you see `rewrite_module (shared)`, then mod_rewrite is already…

In today’s rapidly evolving technological landscape, companies and developers aim to deliver robust, scalable, and easily maintainable applications. Enter “microservices”, a term that has gained significant traction over the last few years. But what are they, and why have they become so popular? In this article, we’ll delve into the world of microservices, explore their key principles and benefits, and compare them with their predecessor, the monolithic architecture. What are microservices? Microservices, also known as the microservice architecture, refer to an architectural style that structures an application as a collection of loosely coupled, independently deployable services. Each service, or “microservice”,…

ZSH, short for the Z Shell, is one of the most popular Unix shells. It’s known for its rich features and enhancements over other shells like bash. One of the features it inherits from sh and enhances further is variable expansion. Variable expansion (or parameter expansion) is the mechanism by which the shell expands a variable to its value. This allows users to manipulate and use the value of a variable in various ways. 1. Basic Variable Expansion At its most basic, variable expansion in ZSH works just like it does in any other Bourne-style shell. name=”ZSH” echo $name #…

Docker offers a way to run applications in a consistent environment, which simplifies deployment and scaling. FastAPI is a modern, fast web framework for building APIs with Python based on standard Python type hints. In this article, we’ll guide you through the process of dockerizing a FastAPI application. Prerequisites Basic understanding of Python and FastAPI. Docker installed on your machine. Steps to Dockerize a FastAPI Application 1. Create a FastAPI application Before we start with the Dockerization process, let’s create a basic FastAPI application. If you have an existing application skip this step. Here’s a simple `main.py`: from fastapi import…

Today, Docker is a popular tool for running and managing apps. A common task is to send network traffic from a port on your computer to a port in a Docker container. This is useful if you want to share a service in the container with the outside world or set up a reverse proxy for load balancing. In this article, we will show you how to forward a port to a Docker container using iptables, a firewall tool in most Linux systems. Step 1: Identify the IP address of the Docker container Run the following command to find the…

Python modules are a convenient way to encapsulate and organize reusable code. If you find yourself copying and pasting the same code across multiple scripts or projects, it’s a good indication that you should consider creating a custom module. In this article, we’ll guide you through the process of creating and using your custom Python module. 1. Understand the Basics A module in Python is simply a file containing Python definitions and statements. The file name is the module name followed by the .py extension. For instance, a module named mymodule would be saved as mymodule.py. 2. Create the Module…

FastAPI is a modern, fast (high-performance), web framework for building APIs with Python. It’s built on standard Python type hints, making it easy to use, while providing a lot of advanced features for developers. When building a FastAPI application, it’s crucial to separate configuration from the code, especially database connection details, for security and modularity. Using .env files and structured code can make this process more secure and maintainable. In this article, we will look at integrating FastAPI with MySQL to handle database operations. Setting up FastAPI with MySQL 1. Setting up the environment: Create a new virtual environment: python3…

GitHub is an essential tool for developers, providing a platform to store, share, and collaborate on code. One common question among users is how to create an empty directory or folder in a GitHub repository. GitHub does not support creating empty directories directly. However, there’s a workaround to this using a dummy file, usually a .gitkeep file. In this article, we’ll explore the steps and reasoning behind this method. Why Doesn’t GitHub Support Empty Directories? Git, the underlying version control system upon which GitHub is based, tracks file changes. Empty directories don’t contain any files, so Git doesn’t track them.…