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Ravikant Kushwaha's articles

  1. Linux
Shell scripting is one of the most powerful tools available on Linux and UNIX-like systems, allowing developers and system administrators to automate repetitive tasks, run SQL queries, and maintain servers efficiently. One common use case is updating database records automatically using cron jobs. In this tutorial, we’ll walk you through creating a shell script that […]
  1. Linux
Whether you’re just starting with Linux or you’re a seasoned developer, the grep command is an essential tool in your command-line arsenal. If you need linux commands for common task, you can read this article, Linux CheatSheet for common tasks In this article, we’ll walk through: Let’s dive in! ✅ What is GREP in Linux? […]
  1. AWS (Amazon Web Services)
Looking to host a fast, secure, and scalable WordPress site on AWS? In this step-by-step tutorial, we’ll walk you through how to set up WordPress using Amazon CloudFront, an Application Load Balancer (ALB), and private subnets—perfect for both test and production environments. Using our demo domain wp.ituptodate.com, this guide is ideal for beginners looking to […]
  1. AWS (Amazon Web Services)
  2. VPC
In AWS, providing internet access to EC2 instances in private subnets is a common requirement for secure architectures. While AWS offers the managed NAT Gateway service for this purpose, it comes with a cost—approximately $32/month per gateway plus data transfer fees. For small-scale projects, startups, or cost-conscious developers, this can add up quickly. Fortunately, you […]
  1. Cheat Sheet
  2. Linux
1. File and Directory Management ls -lah # List files with details (including hidden)cd /path/to/dir # Change directorypwd # Show current directorymkdir newdir # Create a directoryrmdir emptydir # Remove empty directoryrm -rf dir_or_file # Remove file or directory forcefullycp file1 file2 # Copy filemv file1 file2 # Move/rename filefind /path -name "*.txt" # Find […]
  1. Digital Ocean
Scaling a WordPress server horizontally in a self-managed environment is no small feat, especially when you’re not leveraging fully managed cloud services like AWS, Azure, or GCP. This was one of the most challenging and rewarding projects I undertook during my time at Robu.in. By configuring and optimizing virtual machines (VMs) on DigitalOcean, we achieved […]
  1. Cheat Sheet
  2. Docker
🚀 Docker Basics Version & Help docker --version # Check Docker versiondocker info # Show system-wide informationdocker help # Show all commandsdocker <command> --help # Get help for a specific command 📦 Container Management Running Containers docker run hello-world # Run a test containerdocker run -it ubuntu bash # Run a container interactivelydocker run -d […]
  1. Redis
When scaling WordPress applications to handle high traffic, maintaining session persistence across multiple servers becomes a critical challenge. Without a centralized mechanism to manage session data, users may experience issues like login errors or inconsistent shopping carts. This article explores how Redis, an advanced in-memory data store, can be leveraged to ensure seamless session persistence […]
  1. AWS (Amazon Web Services)
Introduction Monitoring EC2 instances is crucial for ensuring optimal performance and preventing issues like underutilization or overloading. AWS CloudWatch allows users to track metrics and set up alarms to trigger notifications based on predefined conditions. In this guide, we’ll walk through setting up a CloudWatch alarm to send email alerts when an EC2 instance’s CPU […]
  1. AWS (Amazon Web Services)
  2. DNS
  3. Networking
When deploying web applications on AWS using multiple Network Load Balancers (NLBs), understanding how traffic is routed across different clients—such as browsers (Chrome, Edge, Firefox, Safari) and mobile apps (React Native-based)—is essential. This article explores how routing works when using Cloudflare DNS with and without the proxy feature enabled. 1. Overview of Routing Mechanisms When […]
  1. AWS (Amazon Web Services)
In Amazon Web Services (AWS), instances within a private subnet cannot access the internet directly. However, a NAT (Network Address Translation) Gateway allows these instances to securely send outbound traffic (e.g., downloading updates, accessing APIs) while remaining inaccessible from external sources. This guide will walk you through the step-by-step process of setting up a NAT […]

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