For Everyone! Essential Introduction to Linux Command Line

This course is conducted with a hands-on approach. Therefore, it is very important not to just watch the lectures, but to actively follow along by entering commands directly. After fully understanding the lecture content, the experience of solving the mission problems provided with each lecture on your own will greatly improve your skills.

If you have any questions while listening to the lecture, I recommend pausing and practicing once more. The mission problems are designed to help you review what you've learned. Through the process of thinking on your own and solving problems, you can gain a deep understanding of Linux.

Listening carefully to the lectures, practicing thoroughly, and diligently solving the mission problems is the best way to effectively learn Linux. Keep practicing and reviewing consistently, and feel free to ask questions about anything you don't understand. I'll be cheering for your growth. 😊

Practice Environment

• Practice in the Arkain(https://arkain.io/) environment without installing a separate Linux system. (The lectures were recorded using GoormIDE, but since the service ended on October 30, 2025, you can practice using Arkain instead.)

• Even if learners have Windows, macOS, or computers with poor specifications, they can practice without any issues as long as they have internet access.

Learning Materials

• Lecture materials are provided as PDF downloads.

  
  

Prerequisites and Important Notes

• No prior knowledge is required.

• Even if you're not from a technical background, having the passion to learn Linux is enough.

  
  

I have a question

• This course provides answers from the knowledge contributor. If you have any questions while taking the course, please post them on the Q&A board and we will provide answers.

• Questions outside the scope of the course may have limited answers.

About the mission

• Missions are problems to check what you've learned and are located at the end of each section.

• It consists of 7-10 questions per section, including both subjective and objective questions, and you can view explanations after submission. (VIM missions do not provide explanations.)

• Mission content may be added or modified based on future student questions.