A modular, efficient log monitoring system for Linux environments that scans system logs, filters critical events, and sends email alerts.

• Automated monitoring of multiple log sources
• Configurable pattern matching for critical event detection
• Email notifications for critical events
• Modular architecture with high cohesion and low coupling
• Comprehensive error handling and logging
• Performance optimized for large log files

• Bash 4.0+
• Linux-based operating system
• Mail utilities (mailutils, sendmail)
• Standard Linux utilities (grep, awk, sed)

1. Clone this repository:

• git clone https://github.com/gautam-cpp/log-monitor.git
• cd log-monitor

2. Run the installation script:

• sudo ./install.sh

3. Configure the system by editing the configuration file:

• sudo nano /etc/log-monitor/config.conf

4. Test the installation:

• sudo /opt/log-monitor/log_monitor.sh --test

The log monitoring system runs automatically via cron job after installation. You can also run it manually: sudo /opt/log-monitor/log_monitor.sh

• --test: Run in test mode without sending alerts
• --verbose: Enable detailed console output
• --config=/path/to/config: Use alternative configuration file

The system is configured via /etc/log-monitor/config.conf. Key settings include:

• LOG_SOURCES: Space-separated list of log files to monitor
• CRITICAL_PATTERNS: Patterns that trigger alerts
• EMAIL_RECIPIENT: Where to send alert emails
• CHECK_INTERVAL: How often to run checks (in minutes)

See the example configuration file for more options.

The system follows a modular design with the following components:

• log_monitor.sh: Main script that orchestrates the monitoring process
• modules/config_handler.sh: Manages configuration loading and parsing
• modules/log_parser.sh: Handles log acquisition and filtering
• modules/alert_manager.sh: Generates and sends alerts
• modules/utils.sh: Provides utility functions

Contributions are welcome! Please feel free to submit a Pull Request.

This project is licensed under the MIT License - see the LICENSE file for details.