Linux Permissions Masterclass – "From Fundamentals to Practical Application, Security, and Service Operations"
This course puts an end to Linux server operational vulnerabilities caused by incorrect permissions. Master file and directory permission control based on real-world industry standards.
31 learners
Level Basic
Course period Unlimited
News
2 articles
Hello.
I have newly written and uploaded the firewall documentation as of 2026.1.23.
Thank you to those who have been waiting, and I am certain you will see great results if you continue to study steadily.Thank you.

thoughtful Note: We are currently preparing to launch basic and advanced firewall courses on Inflearn that are linked to this textbook. This curriculum is being structured to include more detailed and in-depth content so that it can be applied directly in practice. A separate announcement will be made at the time of release, so please keep this in mind if you are interested.
Thank you.
Hello students, this is LinuxMaster.net.
Thank you sincerely for purchasing the course.Even after the course launch, we continue to supplement the content and steadily add videos and materials. The current course has expanded from its initial opening to a total of 92 lectures, totaling 26 hours and 15 minutes, and when reflecting the additional work currently in progress,
the course textbook will be over 340 pages, the number of lectures will exceed 100, and the total lecture time will likely exceed 30 hours.
If you have any questions or need clarification while taking the course, please feel free to ask anytime. I will respond as quickly and thoroughly as possible.Additionally, follow-up courses focusing on Linux fundamentals, security, and practical automation are being prepared sequentially, so please stay tuned
Thank you.I will answer your questions. Additionally, follow-up courses focusing on Linux basics, security, and practical automation are being prepared sequentially, so please stay tuned. Thank you.
Notice of Changes/Additions After Course Launch
I am continuously reviewing all uploaded videos and fixing any errors or areas for improvement.
Section 2. Users and Groups
Related videos have been added.
Section 3. Linux Permissions 1
I've added a video titled Brief Summary of Linux File Permissions and Ownership (approximately 5 minutes).
ACL Basic Practice: To be added
Advanced ACL Practice: To be added
Section 7. Schedule Daemon CRON Service and Permissions
Due to the loss of the original file, the PDF has been newly rewritten.
In the process of organizing the document more cleanly, some expressions/structure/examples may differ slightly from the lecture videos.
Related videos have been added.
Video: To be added
Section 9. APM (Apache + PHP + MariaDB) Services and Permissions
Related videos have been added.
Section 10. Disk Management and Permissions
I plan to add major permission issues that occur during disk-related tasks and practical permission configuration content.
Video: Opening completed ones first
Video: To be added

