Linux Permission Masterclass – "From Basics to Practical Application, Security, and Service Operations"

We have launched the "Introduction to vi/vim Editor" course for Linux users.

vi/vim is an essential editor for Linux server tasks.

In this lecture, within a Rocky Linux 9 environment,

We will practice everything from saving, exiting, and input modes to navigation, deletion, copy/paste, string substitution, screen splitting, and even swap file recovery.

✅ Total 14 lectures · Approx. 4 hours 16 minutes (+ 1 hour to be added)

✅ 40 pages of PDF educational materials provided

✅ 40% discount for 3 weeks to celebrate the opening

If you found vi/vim difficult, take this opportunity to learn it properly.
We look forward to the participation of those interested in learning Linux, server, cloud, security, and infrastructure.

Thank you.

Linuxmaster.net

I have finally uploaded the video I previewed last time.

It's a bit late, but thank you to everyone who waited.

In this video, I have summarized ACL (Access Control List), which is used when basic Linux permissions are not enough, with a focus on practical exercises.

Going one step further from chmod permission settings, you can learn how to grant detailed permissions to specific users or groups. để cấp quyền chi tiết cho những người dùng hoặc nhóm cụ thể.

The contents covered are as follows.

✅ Difference between basic permissions and ACL
✅ Checking ACL permissions with getfacl
✅ Setting user/group permissions with setfacl

I hope this is helpful for those studying Linux server administration or security configuration.

Since it was delayed, I have prepared it to be easy to understand through hands-on practice.
If you are interested, please check it out in the video.

Thank you.

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