📚 DevOps Study Notes

A structured collection of personal study notes created during my DevOps internship at Cognizant, covering industry-standard tools and technologies in an Azure-focused environment.

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🗂️ Repository Structure

Branch	Format	Description
main	.docx	Word documents — full study notes with explanations, diagrams, and examples
pdf-notes	.pdf	PDF versions of the same notes — portable and print-friendly

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🛠️ Tools Covered

☁️ Cloud & Infrastructure

Tool	Topics Covered
Microsoft Azure	AZ-900 Fundamentals, AZ-104 Administrator, NSG rules, VMs, IIS, HTTPS, Azure Entra ID
Terraform	Infrastructure as Code, Azure provider, state management, modules, interview prep

🐳 Containerization & Orchestration

Tool	Topics Covered
Docker	Images, containers, volumes, networking, Docker Compose, Docker Enterprise/UCP
Kubernetes	Architecture, pods, deployments, services, volumes, ConfigMaps, CKA exam prep

⚙️ CI/CD & Automation

Tool	Topics Covered
Jenkins	Pipelines, Jenkinsfile, agents, plugins, multibranch pipelines, interview watch list
Ansible	Playbooks, roles, inventory, modules, Vault — based on Mumshad Mannambeth's course
Maven	Build lifecycle, POM file, Maven coordinates, Super POM, dependencies

💻 OS & Scripting

Tool	Topics Covered
Linux	File system, permissions, networking, processes, shell scripting (Phases 1–4)
Shell Scripting	Bash scripting, multi-host nginx deployment (sequential & parallel)
PowerShell	Cmdlets, pipelines, scripting fundamentals, Azure PowerShell
Git	Branching, merging, rebasing, workflows, conflict resolution

📊 Monitoring & Project Management

Tool	Topics Covered
Splunk	Indexing, searching, dashboards, distributed architecture, CIM deep-dive
JIRA	Agile boards, sprints, epics, issue tracking, DevOps integration

🔍 Reliability Engineering

Tool	Topics Covered
SRE (Site Reliability Engineering)	SLIs, SLOs, SLAs, error budgets, incident management, toil reduction

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📖 How to Use These Notes

1. Switch to the main branch for Word documents (.docx) — best for reading and annotating
2. Switch to the pdf-notes branch for PDF versions — best for offline reading or printing
3. Each file is named consistently: <Tool>_Study_Notes.docx / .pdf

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🎯 Purpose

These notes were created as part of a structured 6-phase learning plan for each tool, covering:

• Core concepts and architecture
• Hands-on examples with Azure-specific context
• Interview preparation and common traps
• Comparisons and real-world use cases

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⚠️ Disclaimer

All notes are personal study materials created for revision and interview preparation during my internship. They are based on publicly available courses and official documentation.

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👤 Author

Allen DevOps Trainee — Cognizant Azure-focused DevOps Pipeline | CI/CD | Cloud Infrastructure

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Last updated: 2026