Author: Rajesh Kumar

Great question. You can validate “payment QR codes” at two levels: Below is a practical, copy-pasteable approach you can drop into your stack (PHP/Laravel, plus quick Node/Python snippets). 1) What…

For many businesses, data masking is vital. In addition to creating anonymized, yet realistic, datasets that can be used in testing, development, or employee training processes, it also protects an…

As the cryptocurrency ecosystem matures, stablecoins like USDT (Tether) remain foundational to digital finance. Used for trading, remittances, and DeFi, USDT operates across multiple blockchain networks. At the same time,…

Accepting cryptocurrency used to be a moon-shot experiment; today it is a line item on the payments roadmap of every forward-thinking merchant. Yet as soon as you Google “accept crypto…

Every engineer knows the power of iteration: small, deliberate improvements over time turn a decent deployment into a rock-solid release. The same principle transforms a good essay into a great…

Technology has transformed how we learn, communicate, and grow. But what makes this era unique is how technology blends with culture, finance, and knowledge-sharing. Exploring a range of digital platforms…

Technology today is more than just tools and code—it’s about innovation, communication, and the ways it impacts every part of our lives. From personal reflections to corporate ventures, from emails…

Technology continues to redefine how we work, communicate, and deliver value. From DevOps to MLOps, from healthcare tech platforms to blogging strategies, the modern digital ecosystem is full of opportunities…

The technology industry is evolving at an unprecedented pace, demanding professionals to stay updated with modern tools, practices, and certifications. Whether it’s Kubernetes orchestration, DevOps culture, GitOps automation, or configuration…

Technology is constantly evolving—and so are the skills needed to thrive in today’s competitive IT landscape. From cloud-native applications to DevOps pipelines, from containerization to automation, the demand for specialized…

Technology is not just shaping our future—it is the future. From automation to cloud computing, DevOps practices to agile consulting, businesses today are navigating a digital transformation that demands speed,…

In today’s fast-moving tech landscape, staying ahead means mastering not just what you build, but how you build it. Agile, DevOps, SRE (Site Reliability Engineering), and robust Build & Release…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market…

1. What is Background Check of Employee? An Employee Background Check is the process of verifying the personal, educational, professional, and sometimes criminal history of a potential or current employee….

1. Users Use case: Add your DevOps engineers, SREs, or business analysts as users with the right permissions. 2. API Clients Use case: When Jenkins, Ansible, or Terraform needs to…

In AppDynamics, both Dashboard and Dash Studio are used to visualize application performance and monitoring data, but they differ in features, flexibility, and intended use cases: 1. Dashboards (Classic Dashboard)…

In today’s aviation environment, cutting-edge electronics are at the heart of safety, navigation, communication, and even passenger experience. The Avionics Technician page by Astronaut & Pilot offers a clear and…

I’ll show console + CLI where useful and give a quick troubleshooting section at the end. 0) Prereqs 1) Create a public hosted zone for rajesh.com Console Route 53 →…

Below is a complete, copy-pasteable, step-by-step guide to put OIDC (Amazon Cognito) + ALB Ingress + gRPC (EKS) behind your DNS with TLS. I’ve included all commands, manifests, and verification…

Here’s a GitHub Self-Hosted Runners FAQ you can use as a quick reference or to share with your team: GitHub Self-Hosted Runners – FAQ 1. What is a self-hosted runner?…

Here’s the exact JMeter setup to create Owners athttp://43.204.220.89:8080/petclinic/owners/new. Thread Group (your load) Config Elements Samplers & Post-Processors 1) GET form page (fetch cookies and optional CSRF) Sampler: HTTP Request…

Step-by-step guide to set up and work with alerts in AppDynamics (the screen you shared is the Alert & Respond → Policies page). 0) How AppDynamics alerts are wired You’ll…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market…

DataOps Certified Professional (DOCP) Global Certification by DevOpsSchool The DataOps Certified Professional (DOCP) is an internationally recognized certification designed by DevOpsSchool to prove expertise in DataOps principles, tools, and automated…

What is DataOps? DataOps is a set of practices, processes, and technologies that apply DevOps principles to data management—streamlining collaboration between data engineers, analysts, and IT teams. The goal is…

1. 🔎 What is JWT? Definition Structure 2. 🔎 What is OIDC? Definition Key OIDC Tokens 3. ❓ Why do we need them? JWT OIDC 4. ⚙️ How each works…

1. Understanding the Role of Each Resource IngressClassParams A Custom Resource Definition (CRD) used with the AWS Load Balancer Controller. It defines AWS-specific settings for your ALB—like scheme (internet-facing/internal), IP…

In AppDynamics, you correlate data across the App Agent, Machine Agent, and Database Agent by giving the Controller enough shared context to stitch them together. Here’s the practical way to…

1) Prerequisites 2) Get your APM endpoint & token/key from Elastic Cloud 3) Download the Elastic APM Java Agent Create a directory for the agent and download the current jar:…