📜 Log Analyzer

Quickly inspect system, authentication, Nginx or custom logs from a single interactive menu

🛠️ Technologies

• Bash scripting
• Core Linux tools: grep, zgrep, awk, sort, uniq, tail, zcat

🚀 Features

• Analyzes common Ubuntu logs
• Analyzes any custom log file path
• Handles compressed logs (.gz) automatically
• Highlights errors, warnings and failed login attempts
• Shows top repeated log messages for quick insight
• User-friendly interactive menu

💡 Why I built it

This script was mainly created to practice Linux admin and bash scripting skills:

• Navigating log formats and rotated logs
• Filtering and highlighting important log messages
• Writing safer Bash scripts with strict mode, file checks and handling empty results
• Creating a reusable, menu-driven tool

🔍 How it works

The script prints a menu to select which log to analyze, each option prints:

• Last few lines of the log
• Recent errors and warnings
• Top repeated messages or most relevant stats (failed logins, top IPs)
• Optionally, you can input your own custom log path that can be scanned

📦 Usage

1. Clone the repository
2. Make the script executable: chmod +x analyzer.sh
3. Run the script (some logs may need sudo): ./analyzer.sh
4. Follow the interactive menu to analyze the logs

🔮 Planned Improvements

• Smarter error/warning filtering and sorting to show the most relevant messages first
• Optional export to a text file
• Show basic log rotation or size info
• Loop back to the menu instead of exiting