Introduction When migrating applications to the cloud, databases are often the most critical and sensitive components. A poorly planned database migration can lead to downtime, data loss, or performance issues. In this hands-on guide, we will migrate a MySQL database from a Linux server to Amazon Aurora (MySQL-Compatible)  using AWS RDS. This walkthrough is ideal for DevOps engineers, cloud engineers, and anyone learning AWS database migration. What You’ll Learn How to create

Introduction In modern cloud environments, auto scaling  is critical for high availability, performance, and cost optimization. Instead of running multiple servers all the time, AWS allows you to automatically scale EC2 instances based on load . In this blog, we will configure: Apache Web Server on EC2 Auto Scaling Group (ASG) Launch Template Target Tracking Policy Scale out when CPU > 5% Automatically launch a second Apache instance This setup is ideal for: Web applications

Monitoring EC2 instances is a basic but critical task for every DevOps engineer. AWS provides CloudWatch for collecting metrics, and Grafana makes visualisation simple and powerful. In this blog, we will learn how to monitor an AWS EC2 instance using CloudWatch and Grafana , step by step, in a clean and practical way. 🧩 Architecture Overview ✅ Prerequisites Before starting, make sure you have: An AWS account A running EC2 instance IAM user with programmatic access Grafana in

📌 Overview Prometheus Node Exporter provides excellent system-level metrics, but in real-world production environments, we often need custom application metrics  — for example: Postfix mail queue size Service status running/failure Application health Queue depth In this blog, we will implement a custom Node Exporter metric  to monitor postfix mail queue and visualise it in Grafana , using the textfile collector,  the recommended and production-safe approach. 🧠 Architecture

Introduction A Linux shutdown is more than just turning off a machine — it is a controlled process that protects running services, active users, and critical data. Understanding what happens during shutdown helps administrators troubleshoot delays, prevent corruption, and manage systems more confidently. [root@siddhesh ~]# shutdown -h now But very few actually know what happens after this command is executed . A shutdown is not just turning off the power.It is a well-orches

AWS CodePipeline provides a native AWS continuous deployment pipeline to manage web application deployments from the source code repository to the deployment of our web application. In this blog, we will walk through setting up AWS CodePipeline to continuously deploy our web application to S3 . We will walk through the prerequisites to set up our pipeline by setting up our source code repository with AWS CodeCommit and creating an S3 bucket to host static web application

Disclaimer : This blog is strictly for educational and authorized security testing  only. Always take written permission before testing any application. Unauthorized testing is illegal. Introduction SQL Injection is still one of the most common and dangerous web vulnerabilities. Even today, many internal tools, admin panels, and legacy applications are exposed due to weak input validation. sqlmap  is an open-source penetration testing tool that automates the process of detect

System integrity is one of the most overlooked areas in Linux security. Firewalls, SELinux, and antivirus tools are common, but they do not tell you if critical system files were modified silently . This is where AIDE (Advanced Intrusion Detection Environment)  fits perfectly. In this blog, I’ll walk through what AIDE is, how it works, how to configure it properly , and how to interpret its output  on RHEL, Rocky Linux, and CentOS . All commands shown below were executed manu

Push notifications are no longer limited to mobile apps or big SaaS platforms. With ntfy , you can send instant push notifications to your mobile or desktop using simple HTTP requests. This makes it extremely useful for DevOps alerts, cron jobs, CI/CD pipelines, monitoring systems, and server-side scripts . In this blog, we’ll set up ntfy  on a Rocky Linux / RHEL  server and securely expose it using Nginx  as a reverse proxy. What is ntfy? ntfy  is a lightweight, open-source

Managing the ARP cache effectively is essential for maintaining smooth network communication on Linux systems. Both Red Hat Enterprise Linux (RHEL) and Rocky Linux rely on the Address Resolution Protocol (ARP) to map IP addresses to MAC addresses within a local network. Understanding how to view, modify, and clear the ARP cache can help troubleshoot network issues, improve security, and optimize system performance. This post explores ARP cache management on RHEL and Rocky Lin

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