50 Essential Linux Commands Learned by Hand - Practice-Oriented Introduction to Linux

If you study the main concepts of Linux, you can handle Linux more easily and more powerfully. I hope you build a solid foundation from the beginning!! :D

Guides you so you don’t get lost at the Linux command prompt. Not all commands are the same. You can distinguish between aliases, Bash keywords, functions, builtins, and external commands. Learn the basics of Bash shell scripting. You’ll no longer be afraid even without a mouse.

To those of you hesitating whether to study Linux shell scripting, I will tell you just one thing. Do you want to handle Linux coolly like a hacker? Can you imagine a hacker who doesn't know shell scripting? Then start right now!

⚓ Kubernetes CKAD Certification! 🙇‍♀️Are you still hesitating? 🚢Board the Ilpro-ho! We will guide you through the optimal route.

The curriculum was created with commands that actual developers use. It does not cover complex concepts related to OS installation or management. You can quickly learn the basics of Linux usage in 2 hours.

Beyond traditional Jenkins-based CI/CD, this course also covers GitOps deployments using ArgoCD. You will design and implement CI/CD and GitOps deployment strategies for dev, staging, and production environments by combining Jenkins and ArgoCD. You will work with both push-based Jenkins and pull-based ArgoCD, directly comparing the two approaches on the same cluster to build a practical hybrid deployment pipeline. You will practice essential deployment techniques for operations, including Canary, Blue-Green, RBAC, approval procedures, incident response, and automatic rollback.

⚓ Kubernetes CKA Certification! 🙇‍♀️Are you still hesitating? 🚢Board the Ilpro-ho! We will guide you through the optimal route.

This is a 'Practical Linux Troubleshooting Course' where you analyze and solve problems together with generative AI, based on a Docker practice environment that reproduces 5 representative failures that occur in actual Linux operating environments. Even those who were overwhelmed about where to start examining problems can learn the problem-solving approach and thought process of field engineers through AI guidance.

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

This is a course taught directly by the author of Hanbit Media's book <This is Ubuntu Linux>.

Now I can analyze the Linux kernel too! The easiest kernel lecture among all Linux kernel courses.

It explains almost everything surrounding the cloud in an easy-to-understand manner. If you listen to it before the actual practice, you will be able to understand development or infrastructure cloud well.

This course focuses not simply on how to configure NGINX, but on solving the problems that arise in interviews and real-world work when you do not understand why these structures and configurations are necessary. Based on experience serving as an interviewer at Naver, Kakao, and Toss and evaluating countless candidates, the course explains, with hands-on practice, how to describe and use NGINX from the perspectives of performance, scalability, and operations. The core of this course is helping you develop a way of thinking that allows you to understand traffic flow and track down problems, rather than merely memorize configuration values.

The author of "Learning the Structure and Principles of the Linux Kernel Through Debugging" provides a thorough explanation of the core interrupt concepts of the latest Linux kernel (v6.1), which are most widely used in system software.

A former AWS employee explains what a well-architected framework looks like within AWS. We will cover how to build an architecture that starts small and scales to handle massive traffic. You will learn various AWS services through a hands-on approach, solving the diverse challenges encountered when designing architectures for high availability and security.

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!

In this course, you will learn how to have a free Linux server worth 20,000 won per month, how to use it, and how to utilize it.

The author of "Learning the Structure and Principles of the Linux Kernel Through Debugging" provides a proper explanation of the core concepts of 'Interrupt Bottom Halves' in the latest Linux kernel (v6.1), which is most widely used in system software.

From Theory to the Field: Proving Core Competencies of a Security Expert through Wazuh+ELK SIEM Implementation Design and operate a Threat Hunting system, the core of security monitoring, firsthand. Through hands-on practice based on real-world attack scenarios, transform into a professional security engineer capable of delivering immediate results in the field.

This course puts an end to operational vulnerabilities in Linux servers caused by incorrect permissions. Completely master file and directory permission control based on real-world practical standards.