🐚 Bash Scripting Toolkit

A structured collection of real-world Bash scripts covering networking, monitoring, logging, backup, and core shell concepts.

This repository is designed for:

• 📘 Learning Bash scripting
• 🛠️ Practicing real-world scenarios
• 🎯 Preparing for DevOps / SRE / Security interviews

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📂 Repository Structure

.
├── backup/
│   ├── simple-backup/
│   └── incremental-backup/
│
├── fundamentals/
│   ├── ifs/
│   └── variables/
│
├── logging/
│   ├── grep-analysis/
│   ├── forensic-scan/
│   └── transaction-logs/
│
├── monitoring/
│   ├── system-status/
│   ├── disk-alert/
│   ├── database-readiness/
│   └── rate-limit/
│
├── network/
│   ├── port-scan/
│   ├── port-check/
│   ├── route-lookup/
│   ├── latency-check/
│   ├── download-speed/
│   └── netstat-cheatsheet/
│
├── process/
│   └── signal-handling/
│
├── validation/
│   ├── args-validation/
│   └── array-validation/
│
└── README.md

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🚀 Key Features

• ✔ Structured, topic-based organization

• ✔ Each script includes:

  • .sh executable file
  • README.md with explanation

• ✔ Covers real-world use cases

• ✔ Focus on clarity and practical learning

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🧠 Topics Covered

🌐 Networking

• Port scanning & port checks
• Route lookup
• Latency measurement
• Download speed testing
• Netstat reference

📊 Monitoring

• System status checks
• Disk usage alerts
• Rate limiting logic
• Service readiness checks

📜 Logging & Security

• Log analysis
• Forensic evidence collection
• Audit logging

💾 Backup

• Simple backup scripts
• Incremental backup with manifest tracking

✅ Validation

• Argument validation
• Array-based validation

⚙️ Fundamentals

• IFS (Internal Field Separator)
• Variable scope (local vs global)

🔁 Process Handling

• Signal trapping and cleanup

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▶️ How to Use

Clone the repository:

git clone <your-repo-url>
cd <repo-name>

Run any script:

bash <script-path>

Example:

bash network/port-check/port-check.sh 8.8.8.8 53

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🎯 Learning Approach

Each module contains:

• Practical script
• Step-by-step explanation
• Key Bash concepts

Start in this order for structured understanding:

1. fundamentals/
2. validation/
3. network/
4. monitoring/
5. logging/
6. process/
7. backup/

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⚠️ Notes

• Scripts are designed for Linux environments
• Some commands may require root privileges
• Outputs may vary based on system configuration

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🧩 Future Improvements

• Add automation (cron-based execution)
• Add logging to files
• Convert scripts into reusable functions
• Integrate with cloud environments

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📌 Author

Manoj Selvan G

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⭐ Contribution

Feel free to fork, improve, and experiment.