📄 README.md

# 🔍 NGINX Log Analyzer Script

This Bash script analyzes NGINX log files and extracts key insights such as:

- Top 5 IP addresses with the most requests
- Top 5 most requested paths
- Top 5 HTTP response status codes
- Top 5 User Agents

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## 📁 File: `analyze_nginx_log.sh`

### 📌 Prerequisites
- The log file should follow the NGINX combined log format.
- Bash shell environment.

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## ▶️ Usage

```bash
./analyze_nginx_log.sh /path/to/nginx/access.log

⚠️ Ensure the script has execute permissions:

chmod +x analyze_nginx_log.sh

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✅ Example Output

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🔍 Top 5 IPs with most requests
==============================
45.76.135.253 - 1000 requests
142.93.143.8 - 600 requests
198.51.100.23 - 532 requests
203.0.113.77 - 498 requests
192.0.2.10 - 450 requests

==============================
📂 Top 5 Most Requested Paths
==============================
/index.html - 842 requests
/login - 653 requests
/products - 529 requests
/css/style.css - 421 requests
/js/app.js - 377 requests

==============================
📊 Top 5 Response Status Codes
==============================
200 - 1235 requests
404 - 423 requests
301 - 210 requests
500 - 89 requests
403 - 65 requests

==============================
🧭 Top 5 User Agents
==============================
Mozilla/5.0 - 843 requests
curl/7.68.0 - 623 requests
PostmanRuntime/7.26.8 - 412 requests
Googlebot/2.1 - 231 requests
Bingbot/2.0 - 189 requests

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🧠 How It Works

• IP Analysis: Extracts the first field using awk '{print $1}', which is the client IP.
• Paths: Extracts the second word within the quoted request string using awk -F\" '{print $2}' | awk '{print $2}'.
• Status Codes: Captures the 9th field with awk '{print $9}'.
• User Agents: Extracts the 6th field within quotes using awk -F\" '{print $6}'.

Each section then:

• Sorts values.
• Counts unique occurrences.
• Displays the top 5 with appropriate formatting (request or requests).

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🔐 License

Feel free to modify and use it for personal or educational purposes.

This is a part of roadmap.sh Devops Projects.