Linux For Hackers #4 - Mastering Linux Permissions

File permissions are at the core of Linux security. In this video, you’ll understand how permissions work, how hackers abuse misconfigurations, and why chmod, chown, and ownership matter during exploitation and system hardening. Permissions are the gatekeepers of Linux. Learn how to read, write, and execute bits to understand how hackers bypass security restrictions.

Are you ready to master the Linux terminal and step into the world of Ethical Hacking and Cybersecurity? This playlist is a curated, step-by-step guide designed to take you from a complete beginner to a confident Linux power user.

What you’ll learn in this series:
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✅ Core Linux commands every hacker must know.
✅ Navigating the file system and managing permissions like a pro.
✅ Mastering the terminal and shell scripting for automation.
✅ Essential networking concepts for penetration testing.
✅ How to use Linux-based hacking tools (Kali Linux/Parrot OS).

Whether you're preparing for the CompTIA PenTest+, CEH, or OSCP, or just starting your journey into cybersecurity, these 10 videos will give you the foundational skills needed to think and act like a hacker.

Don’t just use the tools—understand the system. Hit play and start your Linux journey today! 🚀

Resources:
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Linux Notes: (https://github.com/brian0dayacademy-o...)
Cyber Security Cheat-Sheet: (https://github.com/brian0dayacademy-o...)


Timestamps:
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00:00 - Introduction to Linux Permissions
00:23 - Checking permissions with 'ls -l'
01:28 - The three types of permissions: Read (r), Write (w), Execute (x)
02:22 - Permission categories: User/Owner, Group, and Others
03:32 - How to modify permissions using 'chmod'
04:08 - Method 1: Symbolic Mode (using letters u, g, o, a)
05:19 - Practical: Adding permissions with Symbolic Mode
06:36 - Practical: Revoking/Removing permissions with Symbolic Mode
08:08 - Giving permissions to everyone (a+x)
10:02 - Method 2: Numeric Mode (using octal numbers 4, 2, 1)
11:00 - Calculating numeric permissions (e.g., 755, 644)
12:26 - Practical: Assigning full permissions (777) vs restricted ones
14:18 - Practical: Revoking permissions using Numeric Mode (e.g., 600)
15:41 - Changing file ownership with the 'chown' command
17:35 - Using 'sudo' to change ownership of restricted files
18:08 - Changing group ownership for files
19:33 - Summary and Conclusion

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