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CodeHeader:

Name: Permission — Aliens Wiki HIEN Article Version: 1.0.0 Author: A'nil Cyborg Author URI:…

Overview
🌟

CodeHeader: — Quick Facts

📌

Infobox: Details

🎯

Full Name: Permission (Access Permission /…

⚡

Also Known As: Access Rights, File Modes,…

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Category: Operating System / System…

Topic 1
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Fundamental Concept

📚 Permission ka core idea access control hai — yani system decide karta hai: 1. Subject…
Topic 2
📥 ⚙️ 🔬 💡

Permission Kaise Kaam Karti Hai — Flow

💡 `mermaid flowchart TD A[User/Process Request] --> B{Authentication Check} B -->|Failed|…
Topic 3
🔒

Unix/Linux Permission Model

🎯 Unix/Linux me har file aur directory ke saath permission metadata store hota hai jisme…
Topic 4
⭐

Octal (Numeric) Notation

⭐ Permission ko numbers me represent karna common practice hai. Har permission type ki ek…
Topic 5
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Symbolic Notation

🔑 Symbolic notation me permissions ko letters aur operators se express karte hain:…
Topic 6
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Special Permission Bits

✨ Normal rwx ke ilawa teen special permission bits bhi hain: SUID (Set User ID) — Octal:…
Topic 7
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File vs Directory Permission Differences

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Directory ko r bina x: Listing…

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Directory ko x bina r: Agar file…

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File delete karna: File ki apni…

Topic 8
📥 ⚙️ 🔬 💡

Ownership Model — User, Group, Others

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ls -l output me pehla naam owner…

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Owner ko special privileges milte…

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Root user kisi bhi file ka owner…

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Unix systems me har user ek ya…

Topic 9
📥 📥 🧠 🔬 💡 🎯

chmod — Permission Change Command

📚 chmod (change mode) command se file/directory ki permissions change hoti hain. Syntax `…
Topic 10
💡 📊 🔬

chown aur chgrp — Ownership Commands

💡 chown (Change Owner) `bash chown newowner file # Owner change chown newowner:newgroup…
Topic 11
📥 ⚙️ 🔬 💡

umask — Default Permission Mask

🎯 Jab nayi file/directory create hoti hai to uski default permissions kya hongi — yeh umask…
Topic 12
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POSIX ACL — Extended Permissions

⭐ Traditional Unix permissions sirf 3 categories (owner/group/others) support karti hain.…
Topic 13
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Windows NTFS Permission Model

🔑 Windows ka permission system Unix se kaafi alag hai — yeh ACL-based hai from the ground…
Topic 14
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Windows Permission Inheritance

✨ Windows me permissions parent folder se child items me inherit hoti hain by default:…
Topic 15
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macOS Permission Model

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Standard Unix rwx model (kyunki…

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ls -l, chmod, chown sab kaam karte…

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Extended ACL support (ls -le se…

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UI me "Sharing & Permissions" ke…

Topic 16
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Access Control Models — DAC, MAC, RBAC, ABAC

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Concept: Resource ka owner decide…

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Example: Standard Unix file…

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Pros: Flexible, simple,…

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Cons: Owner compromised ho to…

Topic 17
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SELinux aur AppArmor — Mandatory Access Control

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Developer: NSA (National Security…

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Approach: Label-based — har…

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Mode:

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Enforcing — policies actively…

Topic 18
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Container aur Kubernetes Permissions

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apiGroups: [""]

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kind: User

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name: app

Topic 19
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Cloud IAM Permissions

🎯 Cloud platforms (AWS, Azure, GCP) me permission system IAM (Identity and Access…
Topic 20
⭐

Database Permission Systems

⭐ Databases ka apna permission model hota hai jo OS-level se independent operate karta hai:…
Topic 21
✨

API aur Application-Level Permissions

🔑 Modern applications me OS-level permissions ke upar application-level permission systems…
Topic 22
✨ 📊 🔬

Permission Escalation aur Security Risks

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SUID binary exploit — vulnerable…

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Kernel exploit — kernel…

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Misconfigured sudoers — sudo me…

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Writable PATH directories —…

Topic 23
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Permission Auditing aur Compliance

🌟 Enterprise environments me permission auditing mandatory hota hai compliance (SOC 2,…
Topic 24
✨

Common Problems

🚀 Problem 1: "Permission Denied" Error Samajh Nahi Aata Scenario: Script ya command run…
Topic 25
📥 ⚙️ 🔬 💡

Best Practices

📚 Practice 1: Principle of Least Privilege (PoLP) Har user, process, aur service ko sirf…
Topic 26
✨

History / Timeline

💡 | Year | Event | |---|---| | 1961 | Compatible Time-Sharing System (CTSS) me basic access…
Topic 27
✨

Glossary

🎯 | Term | Definition | |---|---| | Permission | System mechanism jo define karti hai ke…
Topic 28
✨

Disclaimer

⭐ Yeh article sirf educational aur informational purposes ke liye hai. Permission…
Comparison
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File vs Directory Permission Differences

⚖️

Read (r): File content padho (cat,…

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Write (w): File content modify karo…

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Execute (x): File ko program ke taur…

Diagram
📥 ⚙️ 🔬 💡

Visual Flow

📊 Diagram visualization — details in narration
Diagram
📥 ⚙️ 🔬 💡

Visual Flow

📊 Diagram visualization — details in narration
Related Topics

See Also

📖

Authentication

🔗

Authorization

💡

Access_control

📚

Operating_system

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Linux

🌐

Unix

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 1

CodeHeader: ka sabse sahi definition kya hai?

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 2

CodeHeader: ka 'Full Name' kya hai?

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COMPLETE

CodeHeader: Complete!

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CodeHeader: Complete

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