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
, docker engine , what coder use in backgroud , dockerD , docker install
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