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King coder
King coder

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The Best DevOps Prompt to Master DevOps from Zero to Hero

I want a complete, beginner-friendly DevOps guide covering all core and advanced concepts explained in simple words with real-world examples and commands.

Include and explain the following topics clearly with headings, bullet points, real-world use cases, and simple language:

1. Basics of DevOps

  • What is DevOps? Full form of DevOps.
  • Why DevOps is important in modern software development.
  • DevOps as a culture, not just tools.
  • Who is Dev? Who is Ops? What’s the gap DevOps solves?
  • Collaboration between development and operations.

2. Version Control Systems (VCS)

  • What is version control?
  • What is a distributed version control system?
  • Examples: Git, GitHub, GitLab, Bitbucket.
  • What is Git? Why Git is important in DevOps.
  • Common Git commands: git init, git clone, git add, git commit, git push, git pull, git status, git merge, git checkout, etc.
  • What is a merge conflict and how to resolve it?

3. CI/CD (Continuous Integration / Continuous Deployment)

  • What is CI? What is CD?
  • CI/CD pipeline explained with a real-world example.
  • Why CI/CD is essential in DevOps.
  • Build your first CI/CD pipeline using GitHub Actions.
  • Tools to create CI/CD pipelines: GitHub Actions, GitLab CI, Jenkins, CircleCI, Travis CI, Bitbucket Pipelines.
  • What is YAML? Why YAML is used in CI/CD?
  • Basic YAML syntax.
  • GitHub Actions structure: name, on, jobs, job name, steps, step name, run, uses, etc.
  • Real GitHub Actions workflow file example.
  • Setup a pipeline to run Jest tests automatically.

4. Testing in DevOps

  • What is testing? Why testing is critical in DevOps.
  • What is Jest? How to write and run tests using Jest.
  • Integration of testing in CI pipeline.

5. Containers and Docker

  • What is Docker? Why we use Docker?
  • What problems Docker solves (e.g., “it works on my machine” issue).
  • Real-world developer example: You are a developer who builds a website. It works on your system but fails on client’s machine. Explain how Docker solves this.
  • What is a Docker image? What is a container?
  • Difference between Virtualization and Containerization.
  • Docker vs Virtual Machine (VM).
  • Docker Architecture: Client, Docker Engine, Docker Daemon, Docker Hub, Containers.
  • How Docker containers take memory and share system resources.
  • How Docker allocates CPU, RAM, disk space.
  • Important Docker commands: docker build, docker run, docker ps, docker stop, docker rm, docker exec, docker images, etc.

6. Kubernetes (K8s)

  • What is Kubernetes?
  • Why Kubernetes is used with Docker.
  • Difference between Docker and Kubernetes.
  • What is container orchestration?
  • Real-world example of Kubernetes in action.

7. Server Monitoring and Scaling

  • What is server monitoring?
  • Why monitoring is important in DevOps.
  • Types of server metrics: CPU usage, memory, disk, logs, uptime.
  • Best free and open-source monitoring tools: Prometheus, Grafana, Nagios, Zabbix, Netdata.
  • Real-world use case of server monitoring.
  • What is server scaling? Auto-scaling concepts.

8. Logging

  • What are server logs?
  • Why logs are critical in debugging and monitoring?
  • Tools to manage and analyze logs: ELK Stack (Elasticsearch, Logstash, Kibana), Fluentd.

9. Shell Scripting

  • What is shell scripting?
  • Why shell scripting is used in DevOps.
  • Real-world use cases of shell scripting in automation and deployment.
  • Syntax of Bash shell scripting: variables, conditions (if), loops (for, while), functions.
  • Example: Write a basic shell script to automate a task.

10. Infrastructure as Code (IaC)

  • What is Infrastructure as Code?
  • Tools for IaC: Terraform, Ansible, Pulumi.
  • Why IaC is important for scalable infrastructure.

11. Cloud Providers in DevOps

  • Why cloud is essential in DevOps.
  • Overview of AWS, Azure, GCP in DevOps context.
  • Common DevOps services: EC2, S3, Lambda, IAM, CloudWatch (for AWS).

12. DevOps Roadmap

  • Full DevOps roadmap from beginner to advanced.
  • Tools and skills to learn in each phase.
  • Learning path suggestions.

13. Interview Prep

  • Real DevOps interview questions.
  • Key concepts interviewers often test.
  • Best practices and common mistakes to avoid.

Format the notes:

  • Beginner-friendly
  • Use clear headings and subheadings
  • Use bullet points for important items
  • Use real examples and commands with explanations
  • Avoid jargon unless explained simply

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