Скачать или смотреть Master chmod Permissions | File Security for Security+ (Ep.22)

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In this episode, you’ll master the chmod command — your key to managing file and directory permissions in Linux. Whether you're securing scripts, controlling user access, or responding to permission-based vulnerabilities, chmod is a must-know tool for the Operations and Incident Response domain of the CompTIA Security+ (Exam SY0-701).

✅ What You’ll Learn:
How to use symbolic and numeric modes to change permissions
What the read (r), write (w), and execute (x) bits actually do
How to protect sensitive files and harden your Linux environment

🧠 Why This Matters:
Misconfigured file permissions can expose critical data or allow attackers to escalate privileges. chmod is your first line of defense — and knowing how to use it is a foundational Security+ skill that you’ll apply on the job and in the exam.

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📘 Companion Guides:
https://sites.google.com/view/fmerin/...

📂 Exercise Files & Scripts:
https://sites.google.com/view/fmerin/...

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🔍 FAQs
What is chmod?
A command-line utility used to change file and directory permissions in Linux.

Who uses it?
Cybersecurity professionals, system administrators, DevOps engineers, and Linux users of all levels.

Where is it used?
On all Linux-based systems — including Kali Linux, Ubuntu, and WSL environments.

Why is it important for Security+?
File permissions are critical for system security, and chmod helps you configure them safely — a required skill for the exam.

How is it used in real-world cybersecurity?
To secure scripts, restrict access to logs, and reduce the attack surface by limiting execution rights.

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Next up: Use netstat to identify active connections, open ports, and potential backdoors.

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