AWS Terraform in Practice: From Console to Infrastructure as Code

To ensure you are no longer afraid of the black screen, we will practice everything from server access to log checking and resource monitoring using only the 21 essential commands. You will start immediately in a web environment, learning everything from how to exit vi to hands-on practical inspection routines.

Learn step-by-step English expressions actually used in IT practice, from reading official documentation and writing tickets or emails to sharing incident reports and conducting technical interviews. Master practical English that you can apply immediately today with templates and examples extracted from over 20 years of infrastructure operations experience. Learn real-world business English for global collaboration, not just English for exams.

This is an introductory networking course for non-majors that focuses on understanding the flow of communication through visuals rather than memorizing terminology. Using the layered model as a framework, we follow the entire process of what happens when you enter a URL into the address bar from start to finish, helping you build practical networking intuition that can be applied immediately in the real world.

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Learn the basic structure of Saju Palja and the meanings of the Heavenly Stems and Earthly Branches, and study how to establish and interpret your own Saju using the Manseryeok (Ten Thousand Year Calendar). By understanding the Sipsin system and the flow of Daewun (Great Fortune) and Sewun (Annual Fortune), you will be able to read your own Saju and write an interpretation report in just 12 sessions.

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This is a process of utilizing AI coding tools without blindly trusting them, verifying results, understanding structures, and completing actual services. Instead of memorizing syntax, you will learn through project-based work, gaining experience from error resolution to deployment to build your portfolio. Even with no prior development experience, you can develop judgment skills through collaboration with AI and acquire a sense of practical teamwork.

Learn practical AIOps methodologies to move beyond alarm storms and repetitive incident responses toward data-driven problem prediction and automation. This is a practice-oriented course infused with 20 years of operational experience, covering everything from data preparation and anomaly detection to root cause analysis that can be applied immediately in the field without being tied to a specific product.

We will follow the entire flow of a request, from the moment an address is entered into a web browser until the results are displayed on the screen. By comprehensively understanding how the terms learned in lessons 1 to 3 are actually connected and function, you will develop the diagnostic skills to quickly narrow down the problem area when a failure occurs.

Systematically master the basics of English speaking by following a 4-week curriculum with precise daily instructions. With 50 core expressions, verb usage, and practical scripts all included in the slides, you can master daily training methods and apply them immediately without the need for a separate textbook. Through a comprehensive learning design spanning from diagnosis to correction, even beginners can gain confidence in basic conversation within just 4 weeks.

For beginners new to messaging systems, this guide explains everything from Kafka's origins to its core components, operating principles, and practical applications using only concepts and illustrations. Without the need for code or installation, it clearly distinguishes key terminology such as topics, partitions, and consumer groups, helping you build the fundamental strength to read real-world architecture diagrams.

You will systematically learn the principles of how the CPU, memory, and disk collaborate, as well as how the operating system mediates resources. You will acquire practical foundational knowledge to read server specification sheets and identify performance bottlenecks, establishing a basis for learning about cloud and network technologies.

Understand the entire journey from the moment a URL is entered into the browser address bar to the screen being rendered, and build a practical deployment environment by directly installing and configuring an Nginx web server. Develop practical skills to identify the causes of failures on your own through log analysis and status codes.

An introductory course that makes the terminal less intimidating even for Linux beginners, teaching you how to view server logs, find files, and develop practical skills using just cd / ls / grep

Systematically learn over 60 IT terms encountered in practice, ranging from job postings to meeting minutes and incident reports. Understand service structures by dividing them into four layers, and acquire the essential vocabulary needed for collaborating with development teams and attending technical lectures.

This is a 4-week program designed to build English speaking circuits through sentence output training rather than word memorization. Through 15 minutes of daily training involving whole-sentence memorization and a 5-step shadowing process, you will develop the ability to speak English with instant reactions without translating in your head. We focus on training mouth muscles and reaction speed rather than just injecting knowledge.

It is perfectly fine if you have no prior programming experience. We will learn step-by-step, from environment setup to error troubleshooting and basic syntax, while building a working program in every single lecture. After completing the 10-lecture course, you will be able to design and implement simple programs on your own.

This step-by-step program mixes walking and running to help your body adapt safely, aiming to complete a 10km run after 12 weeks. You will systematically learn proper posture, breathing techniques, injury prevention, and recovery management, building a sustainable running habit with 40-minute training sessions three times a week.

This is an intermediate course where you will design AWS infrastructure as code using Terraform and practice everything from automated deployment to security management. Through practical examples and hands-on exercises, you can develop skills in efficient infrastructure operation and management automation.

Have you ever skipped over the difference between m7i and m7g in the AWS console without knowing what it was? This lecture clearly explains the concept of AWS Graviton (ARM-based processors) in just 30 minutes. From instance type naming conventions to cost-saving principles and practical application criteria, we explain everything step-by-step at a beginner's level.

I have created an 'Introduction to Kafka' course that is easy for non-majors to understand and can be applied immediately in practice!

Learn cloud infrastructure automation technology using AWS and Terraform, and practice efficient infrastructure management and deployment. Manage AWS resources as code through Terraform, and learn how to deploy consistent infrastructure across various environments.

You can learn about IAM, the foundation of AWS Zero Trust, from the most basic elements to the most detailed specifics. Through this, you can learn which parts may actually be vulnerable and where you need to pay more attention.

What is DevSecOps? Configure a CI build environment and an environment that automatically performs SAST checks during build

I've created a cram course that will help you pass the AWS SAA-C03 (AWS Certified Solutions Architect - Associate) certification in just 2 weeks with only 163 questions!

This course focuses on solving the problem of getting stuck in interviews and practical work due to a lack of understanding of why certain structures and configurations are necessary, rather than just teaching how to configure NGINX. Based on experience evaluating numerous candidates as an interviewer for companies like Naver, Kakao, and Toss, I explain how to describe and utilize NGINX from the perspectives of performance, scalability, and operations through hands-on practice. The core of this course is to help you develop a mindset capable of tracing traffic flow and troubleshooting problems, rather than just memorizing configuration values.

Even beginners of Github can do it! Even beginners of Python can do it! Create a crawling web service that performs periodic crawling using Github Action.

It is configured to allow you to learn programming languages (Python, Terraform) for the cloud. You can directly create and apply simple yet tedious repetitive tasks, track when and how you deployed, and implement your company's unique policies that specific solutions cannot address. Specifically, we will apply a security architecture using Terraform, the most popular IaC (Infrastructure as Code) application, and also proceed with creating an ultra-simple dashboard using Python!

This course is designed to help you quickly learn server deployment methods using Nginx, Docker, and Spring Boot through hands-on practice. Learn Blue-Green deployment, a frequently used technique in the industry, faster than anyone else!

Learn from the beginning how to set up a development environment that even an ordinary office worker can easily understand. It is practice-oriented and focuses on students learning various development tools such as Vim, VS Code, Git, Docker, and remote development. You can learn how to build an efficient development environment by learning step-by-step from the basic usage of each development tool to advanced functions.

If you want to work for a long time as a super developer who can handle the entire process of service development and operations alone, building a solid foundation in IT infrastructure knowledge is just as important as learning various programming languages!

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In an era of explosive data growth and crucial real-time processing, edge computing has established itself as an essential technology, no longer an option. This course is designed to systematically teach everything, from the core concepts of edge computing to deployment strategies for its application in real business environments. Through this course, students will firmly solidify the fundamental principles of edge computing and acquire practical knowledge and know-how applicable to real-world tasks and projects. Take the most certain first step towards becoming an edge computing expert, a core technology in the future IT environment!

This course systematically teaches practical Docker skills (installation→operation→automation→security) and comprehensively covers the latest security threats and countermeasures in each section. It features a hands-on approach where you learn by following along with practical exercises. This curriculum is highly recommended for DevOps engineers, infrastructure engineers, and security practitioners who want to experience the latest container/cloud environments in real-world scenarios.

I have created a 'Linux for Beginners' course that is easy for non-majors to understand and can be applied in practice immediately!

This course is an introductory lecture prepared for those who are new to Terraform, an infrastructure automation tool. Instead of repeatedly performing manual configurations in cloud environments, you can learn how to easily and quickly build and manage infrastructure using code. It is specifically designed with easy explanations and hands-on exercises that even non-majors can follow, so that beginners who are encountering the concept of IaC for the first time can understand it.

This is a DevOps course based on practical experience in Silicon Valley. It goes beyond theory to cover content that can be applied immediately in the field. You will learn how to develop using Generative AI (Vibe Coding), set up CI/CD tools in a Kubernetes environment, and implement strategies to keep operating costs at $0. We will cover configuring a production environment without additional costs by running DB, Redis, S3, and batch jobs inside Kubernetes, and you will master building automated pipelines using GitHub Webhooks and Jenkins through hands-on projects.