🐧 Linux Notes & Guides

Comprehensive guides and practical notes covering Linux fundamentals to advanced system administration. Designed for beginners through DevOps professionals.

📚 What You'll Learn

This repository provides structured learning materials covering:

• File systems, commands, permissions, and shell configuration
• Process management, services, user management, and startup sequences
• SSH/SCP, firewalls, ports, and network file systems
• Kernel management, virtualization, encryption, and security (SELinux)
• Text processing (grep, sed, awk), monitoring, and package management

Each section includes hands-on challenges to reinforce your understanding and build practical skills.

🗂️ Learning Path

The notes are organized from beginner to advanced concepts. Follow this recommended progression:

🔰 Beginner Level

• Introduction to Linux
• Basic Commands
• Files and Directories
• File System Structure
• Permissions

🔧 Intermediate Level

• Shells and Configuration
• Pipe and Redirect
• Finding Files
• Environment Variables
• Archive Management (Tar & Gzip)
• Inodes and Symlinks

👥 System Administration

• User Management
• Process Management
• Disk Usage & Monitoring
• Mounting File Systems
• System Startup & Boot Process
• Scheduled Tasks (Cron)
• System Services

🌐 Networking & Security

• SSH & SCP
• Networking Fundamentals
• Port Management
• Firewall Configuration
• Package Managers
• Performance Monitoring
• Log Analysis

🔍 Text Processing & Utilities

• Grep - Pattern Searching
• Sed & Awk - Text Processing
• System Utilities

🚀 Advanced Topics

• Encryption & Security
• Kernel Management
• Environment Modules
• Virtual Machines
• Disk Partitioning
• Logical Volume Management
• Network File System (NFS)
• LDAP Integration
• SELinux Security
• Dynamic Window Manager

🎯 Quick Start

1. New to Linux? Start with Introduction to Linux
2. Need specific commands? Jump to Commands
3. System admin tasks? Check the System Administration section
4. Looking for challenges? Each guide includes practical exercises

📖 References & Further Reading

📚 Essential Books

• Nemeth, Evi; Snyder, Garth; Hein, Trent R.; Whaley, Ben
  UNIX and Linux System Administration Handbook - Amazon

• Frisch, Æleen
  Essential System Administration - Amazon

• Turnbull, James; Lieverdink, Peter; Matotek, Dennis
  Pro Linux System Administration - Amazon

🌐 Online Resources

• Columbia University - UNIX/Linux Lectures
• Imperial College London - Unix Introduction
• Linux From Scratch
• GoLinuxCloud - Commands Cheat Sheet
• How To Secure A Linux Server

🔧 Specialized Topics

• Environment Modules Tutorial
• SELinux for Mortals
• Managing ACLs on Linux
• Beginner's Guide to Nmap

🤝 Contributing

We welcome contributions! Whether you want to:

• 🐛 Report bugs - Open an issue
• ✨ Suggest improvements - Start a discussion
• 📝 Add content - Submit a pull request
• 🔧 Fix typos or errors - Pull requests welcome!

Please read our contribution guidelines before submitting changes.

📄 License

This project is licensed under the MIT License - feel free to use, modify, and distribute.

⭐ Star History

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Happy Learning! 🚀
_{Built with ❤️ for the Linux community}