GitHub Repository Settings — Complete Reference Guide & Tutorial
Last Verified: September 2026Platform: GitHub.com / GitHub Enterprise Cloud unless stated otherwiseAudience: Developers, DevOps engineers, repository administrators, security engineers, platform engineers, team leads, and trainers GitHub repository settings are the…
GitHub Organization Administration — Complete Reference Guide and Tutorial
Last Verified: September 2026Scope: GitHub.com organization administration, with GitHub Enterprise Cloud and GitHub Enterprise Server differences called out where they materially affect administration.Audience: GitHub organization owners, platform engineers, DevOps engineers,…
GitHub Packages — Complete Reference Guide & Hands-On Tutorial
Last Verified: September 2026Scope: GitHub.com / GitHub Enterprise Cloud unless explicitly stated otherwiseAudience: Developers, DevOps engineers, platform engineers, administrators, architects, trainers, and engineering teams GitHub Packages is GitHub’s package-hosting platform….
GitHub Projects — Complete Reference Guide & Tutorial
Scope: Current GitHub Projects / Projects v2, not Projects (classic).Audience: Developers, DevOps engineers, engineering managers, product managers, project administrators, platform teams, and GitHub organization owners.Last verified: 2026-09-26 against current GitHub documentation.Learning…
GitHub Actions — Complete Tutorial & Production Handbook
Audience: Developers, DevOps engineers, platform engineers, SREs, security engineers, technical leads, and architectsLevel: Beginner → Intermediate → Advanced → EnterpriseLast verified: 2026-09-26Primary source: GitHub Actions official documentation, plus the supplied 62-section…
Git: Git Branching & Merging – A Complete Tutorials
PRACTICAL TECHNICAL HANDBOOK / 19 SEPTEMBER 2026 Git Branching & Merging Branch types, integration choices, conflicts and safe recovery Understand what Git changes, choose the right method,…
AWS Elastic IP Cross-Account / Cross-Organization Transfer Runbook
Use case: AWS Organization A / Account A → AWS Organization B / Account BObjective: Retain the exact same public IPv4 address while changing AWS account ownership….
Terraform Developer Toolchain – Hands-On Lab Manual
DOWNLOAD – HERE Write -> Validate -> Test -> Lint -> Secure -> Document -> Cost -> Automate -> Govern Framework What | Why | When |…
Kafka Master Tutorials Series: 7 Topics, Partitions, Consumers, Consumer Groups & Lag
Developer Planning Guide for Correct Mapping, Scaling, Reliability and Performance Audience: Developers, students, freshers, architects, platform engineersTraining context: Confluent Kafka ClusterGoal: Remove confusion around how Kafka Topics, Partitions, Producers, Consumers,…
Kafka Master Tutorials Series: 6 – Kafka Consumer Deep Dive
Consumer Groups, Parallelism, Offsets, Rebalancing, Failover, Consumption Patterns and Production Tuning Audience: Students and freshers with no previous Kafka experienceGoal: Start with “What is a consumer?” and finish with…
Redis Tutorials: A Complete Fundamental Turorials
From Fundamentals to Production-Grade Caching, Sessions, Pub/Sub, Counters, Locks and Failure Handling 1. What is Redis? Redis is a high-performance, primarily in-memory data store. The easiest mental…
Kafka Master Tutorials Series: 5 – Deep Dive Into Kafka Producers
From send() to Broker ACK: Keys, Partitions, Batching, Retries, Reliability, Latency and Performance Tuning Audience: Students and freshers with no prior Kafka experienceGoal: Build from producer fundamentals to production-grade Kafka producer…
Kafka Master Tutorials Series: 4 – Confluent Cloud Kafka — Production Checklist
1. Cluster Architecture Recommended architecture: 2. Capacity Planning Confluent recommends monitoring cluster load closely. Sustained load around 70–80% is a reason to consider adding CKUs, while above…
Kafka Master Tutorials Series: 3 -Capacity Planning in Confluent Cloud
1. What is Kafka Capacity Planning? Capacity planning means calculating how much Kafka capacity your application needs before production traffic arrives. In simple words: How big should…
Kafka Master Tutorials Series: 2 – How Kafka Works & its Architecture & workflow
Kafka Architecture 1. Learning objectives By the end of this tutorial, a student should understand: 2. Start with the simplest Kafka architecture At the highest level: For…
Kafka Master Tutorials Series: 1 – An Introduction of Kafka
What Is Apache Kafka? Learning Objective By the end of this tutorial, you should be able to explain: 1. Start With a Simple Problem Imagine that we…
Go Tutorials: 15-Minute Lab: Dependency Management with Go Modules
Goal In this quick lab, you will experience the most important Go Modules concepts: Estimated time: 15 minutes 1. Check Go and Create the Module — 2 minutes…
Go Tutorials – Hands-On Lab: Dependency Management with Go Modules
rajeshkumarwww.devopsschool.com/tutorials
Go Tutorials: Go Methods
Go methods become much easier once you understand one idea: A method is simply a function attached to a type. And the important rule is: A receiver…
Go Tutorials: Modules, Packages, Subpackages, Submodules, and Workspaces
This tutorial gives you one complete mental model for: The most important idea is: And sometimes: These two designs are very different. 1. What is a Go…
Go Tutorials: Numeric Types Beginner Tutorial
Go has four main families of numeric types: The simplest way to remember them is: Type family Stores Example int Whole numbers, positive or negative -10, 0,…
Go Tutorials: Go Testing, Benchmarking, and Profiling
These three topics become much easier once you separate the questions they answer: Topic Main question Main Go tool Result Testing Does my code work correctly? go…
Go Tutorials: Generics
1. What are Generics? Generics let you write one piece of code that works with multiple types while keeping Go’s compile-time type safety. Suppose you want a…
Go Concurrency Management Made Simple
This tutorial covers: The goal is: One concept → one purpose → one complete runnable example. Every example is independent. Save any example as: and run: 0….
Go Tutorials: Concurrency Made Simple
This tutorial covers: The goal is simple: One concept → one mental model → one complete example. Every example is independent. You can copy it into main.go…
Go Tutorials: Dependency Management with Go Modules
Go Modules become much easier once you keep one mental model in mind: Your Go source code says what packages you use. go.mod says which modules/versions provide…
Go Tutorials: Composition Instead of Classical Inheritance
This is one of the most important mindset changes when coming to Go from Java, C++, C#, or Python. The key idea is simple: Inheritance says: “I…
Go Tutorial: Exported and Unexported Identifiers
This concept becomes much easier once you remember one rule: Starts with an uppercase letter → ExportedStarts with a lowercase letter → Unexported In Go, this is…
Go Tutorials: Go Interfaces & Implicit Interface Implementation
These two ideas are closely related. The easiest mental model is: Interface = a list of behaviors.Implicit implementation = Go automatically accepts any type that has those…
Go Tutorials: Go Functions Master Guide
A function is one of the most important building blocks in Go. If you understand functions properly, concepts such as methods, interfaces, goroutines, error handling, defer, callbacks,…
Go Tutorials: Arrays, Slices, Maps, and Structs
These four concepts are fundamental Go data structures. A simple way to remember them: 1. Arrays What is an Array? An array stores multiple values of the…
Go Tutorials – Go Concurrency Beginner Tutorial
Yes. Here is a simple Mermaid diagram showing both Concurrency and Parallelism in Go. Concurrency — 1 CPU Core Meaning: The Go scheduler switches between goroutines because…
Go Tutorials – Go Error Management — Easy, Complete Tutorial
The most important rule to remember is: In Go, errors are normal values. A function usually returns an error, and the caller decides what to do with…
Go Tutorials — Module, Package, Function, Method & Interface
These five concepts become much easier once you see how they fit together: The simplest mental model is: Module = ProjectPackage = Folder / code groupFunction =…
Go Tutorials – Generic Programming and Generic Functions in Go
Part 1 — One-Page Summary What is Generic Programming? Generic programming means writing code that can work with different data types without rewriting the same logic for…
Go Tutorials: Go Type Assertions — Easy Basic to Advanced
1. What Is a Type Assertion? A type assertion is used when you have a value stored inside an interface and you want to check or retrieve…
Go Tutorial: Go Interfaces
These three concepts are confusing initially because a method looks almost exactly like a function. The easiest way is to learn them in this order: Function →…
Go Tutorial: Go Functions and Methods
Go programs are built from small pieces of reusable behavior. Two of the most important pieces are: At first they look almost identical. A function: A method:…
Go Tutorial: Go Blank Identifier _ — Master Tutorial
The underscore: is called the blank identifier in Go. The easiest way to understand it is: _ means: “Go gives me this value, but I intentionally do…
HashiCorp Vault Master Lab – PostgreSQL Database Secrets Engine + Userpass Authentication + Vault Policy + Dynamic PostgreSQL Credentials
Complete Beginner-Friendly Hands-On Tutorial for Ubuntu Linux 1. Lab Objective In this lab we will build the following environment on a single Ubuntu Linux server: By the…
HashiCorp Vault Master Lab – Consul Secrets Engine + Userpass Authentication + Vault Policies + Dynamic Consul Credentials
Beginner-Friendly Hands-On Lab for Ubuntu Linux 1. Lab Objective In this lab, we will build the following environment from scratch: By the end of the lab, students…
How to Install and Configure ZAP Proxy on macOS: A Complete Step-by-Step Guide for Beginners
Last updated: 26 July 2026 ZAP, formerly known as OWASP ZAP, is a free and open-source web application security testing tool. It can act as a proxy…
Azure Storage Services Lab Using an Existing Ubuntu 24.04 VM
Blob Storage, Azure Files and Managed Disks Interface: Azure portal for resource creation and configurationClient system: Existing Azure VM running Ubuntu Server 24.04 LTSValidation date: July 19,…
Master Guide: AWS Billing and Cost Management
Below is a master guide to AWS Billing and Cost Management, written like a complete FinOps tutorial. I’ll map every menu item you listed and explain: Master…
Prometheus – Step-by-Step Guide: Install Prometheus on Kubernetes Using Helm with hostPath PV and PVC
Prometheus is one of the most popular open-source monitoring systems for Kubernetes. It collects metrics from Kubernetes nodes, pods, services, and applications, and gives you a powerful…
Terarform: How to Install Terraform and tfenv on macOS (Apple Silicon & Intel) – Complete Step-by-Step Guide
Introduction Terraform is one of the most popular Infrastructure as Code (IaC) tools used to provision and manage cloud infrastructure across AWS, Azure, Google Cloud, Kubernetes, Datadog,…
MongoDB: The Complete MongoDB Atlas Authentication & Authorization Tutorial
MongoDB Atlas security becomes simple once you stop treating “Atlas access” and “database access” as one thing. They are two different systems: MongoDB’s own docs make this…
Datadog Synthetic Tests vs Synthetic Test Suites: Complete Tutorial Guide
1. Simple Meaning In Datadog, Synthetic Tests are the actual checks that run against your application. A Synthetic Test Suite is a logical group of multiple Synthetic…