Basic Linux (Ubuntu) knowledge for developers

Learn systematically from the basics to advanced features of Zabbix, an essential tool for effectively monitoring IT infrastructure. Through real-world application cases, this course provides an opportunity to become an expert in monitoring with Zabbix.

You’ll learn by entering and executing commands yourself instead of relying on theory and memorization. From file management and permission settings to job control, you’ll get hands-on with 50 essential commands. (95% of the entire course is practical training.) The goal isn’t to memorize commands, but to become familiar with Linux. Each lesson begins with the question, “Can I do this?” ● Beginners who have installed Linux but are new to commands ● Those who have heard of command names but don’t know when to use them ● Those who want to try it out before enrolling in a paid course Practice environment: A Linux terminal must be ready. (Installation is covered in “Getting Started with Linux Properly.”) 29 lessons, approximately 8 hours · Free A veteran instructor with 27 years of experience guides you at a beginner-friendly level.

This lecture will teach you the basic commands required for performance analysis of Linux servers, how to use the tcpdump command to solve network problems, and troubleshooting methods based on cases. Through this lecture, you will be able to solve various performance problems that occur on Linux servers.

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.

Experience the Jeju-based bootcamp online! Quickly create your own service! :)

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.

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!

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

Creating the same up-to-date app development environment by installing Nix on Mac, MS Windows, NixOS, all Linux distributions, and Synology NAS.

Software development roles in the defense industry: ✔ Have different hiring criteria compared to general IT companies ✔ Use specialized tech stacks and development methodologies ✔ Offer very little information on how to effectively highlight your major, career, and projects. This course: 👉 Provides the perspective of a software developer who has experienced actual defense projects and hiring processes 👉 Explains how defense companies evaluate software developers 👉 Focuses on specific case studies to show you how to prepare your resume, interviews, and projects to increase your chances of success. This course transforms the state of "wanting to become a defense software developer but having no idea what to prepare" into a "clear roadmap you can start following right now."

From installation and basic usage to vi, permissions, home directories, and file classification. We guide beginners through the areas where they most often get stuck, using hands-on practice. With a good guide, the black terminal window is no longer intimidating. We’ll be your reliable companion as you explore the world of Linux. ● Beginners encountering Linux for the first time, without a technical background ● Students in technical majors who want to rebuild their foundations ● Developers who need basic training ● Anyone who needs to learn the Linux basics first for service operations Practice environment: Windows (WSL / VirtualBox), Ubuntu 24.04, Rocky 9 (Mac users can practice after launching Bash) This course covers the fundamentals you need to learn hands-on, even in the age of AI. You’ll learn how to install Linux, work with files, edit with vi, and resolve permission errors. A lecturer with 27 years of experience will guide you at a beginner-friendly level. Spend one hour a day for about a week, and Linux will start to make sense.

What if AI could directly open a browser and write shell scripts to resolve server issues? Through practical automation know-how implemented with OpenClaw across Windows and Linux, we guide you on the shortest path to completing your own powerful remote development environment without complex configurations.

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.

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

Let's experience collaborative application development in a Linux shell and open-source software environment, and set up the development environment required for coding!

This course covers the latest data structures and algorithms used in representative open sources such as Linux.

Linux for Beginners: Mastering the Command Line. The ultimate course for Linux administration in corporate jobs. Unlock the power of the Linux operating system with this comprehensive beginner-friendly course. Whether new to IT or wanting to advance technical skills, this course will take one from zero to proficient in Linux fundamentals. Learn to navigate the command line, manage files and directories, handle permissions, and automate tasks with shell scripting. What You'll Learn: How to Navigate the Linux File System and Master the Command Line Managing users, groups, and file permissions for secure access Installing, updating, and removing software with package managers Basic system administration and troubleshooting skills With hands-on labs and real-world examples, you’ll quickly build confidence in managing Linux environments. By the end of this course, you’ll have a strong understanding of essential Linux concepts like file permissions, process management, and network configuration. Also, this course covers basic networking, disk management, and process monitoring. Whether you have a career goal in the realms of DevOps, cybersecurity, or cloud engineering, learn Linux today to make more career opportunities pop open in IT, DevOps, SRE, Support, IT helpdesk, IT Admin, cybersecurity, or software development! Practical Skills for Self-Confidence on Any Linux-based System Boost Your Tech Portfolio

We will create a remote development environment using VS Code and extensions, and learn about WSL and code-server, a VS Code used on the web.

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.

This course puts an end to operational vulnerabilities on Linux servers caused by incorrect permissions. Master file and directory permission control completely based on real-world practices.