Linux & Security Fundamentals – Training Notes (Inspired by OverTheWire)

This repository contains my personal notes, commands, and small tools created while practicing Linux and basic security concepts using the OverTheWire wargames as inspiration.

⚠️ No flags or level solutions are included. This repository focuses on what I learned, not on revealing answers.

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📁 Repository Structure

bash-scripting-labs-OTW/
├── Notes.md                    # Concepts, commands, and lessons learned
└── Scripts/                    # Small utilities created during the labs
    ├── descompresor.sh
    └── procmon.sh

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🧠 Notes (Notes.md)

This file contains:

• Linux commands practiced (filesystem, permissions, processes, pipes…)
• Explanations of how they work
• Real examples used during challenges
• Key takeaways related to security and system behavior

These notes serve as a reference for:

• CTF beginners
• Pentesting students
• Anyone learning Linux fundamentals

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🛠 Included Scripts

descompresor.sh

A helper script for automating multi-layer decompression. Useful in challenges where files are compressed inside one another repeatedly (gzip, zip, bzip2…).

Features:

• Detects whether the extracted file is another compressed file
• Loops automatically until final content is reached
• Suppresses noisy output for clean processing

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procmon.sh

A simple real-time process monitor. Compares the current list of processes against the previous one and shows only what changed.

Useful for observing:

• ephemeral processes
• processes spawned by SUID binaries
• unexpected activity in training environments

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⚖️ Ethical Note

These materials were created for learning Linux and security principles, not to distribute solutions or walkthroughs of OverTheWire challenges.