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Monitoring

System Monitoring Real-Time System Status The System and Server Status module can be used to check for and report down systems, failed servers, network outages and other problems.

Monitoring Categories:

  • System Resources: CPU, memory, disk usage

  • Network Status: Interface statistics, connectivity

  • Service Status: Running services and daemons

  • Security Status: Login attempts, security events

  • Performance Metrics: System load, response times

System Information Dashboard

bash
# Key metrics monitored:
- System uptime and load averages
- Memory usage (RAM and swap)
- Disk space utilization
- Network interface statistics
- Process list and resource usage
- System temperature and hardware status

Service Monitoring Service Status Checking

  • HTTP/HTTPS Services: Web server availability

  • Database Services: MySQL, PostgreSQL connectivity

  • Mail Services: SMTP, IMAP, POP3 status

  • DNS Services: Name resolution testing

  • File Services: FTP, SSH, Samba availability

Automated Monitoring

bash
# Configure monitoring in System and Server Status module:
- Set monitoring intervals (1-60 minutes)
- Configure email notifications
- Set up custom monitoring scripts
- Define service dependencies
- Configure escalation procedures

Log Monitoring System Log Analysis

  • System Logs: /var/log/messages, /var/log/syslog

  • Security Logs: /var/log/auth.log, /var/log/secure

  • Service Logs: Apache, MySQL, mail server logs

  • Webmin Logs: Administrative action logs

Real-Time Log Viewing

  • Live Log Tailing: Real-time log file monitoring

  • Log Filtering: Search and filter log entries

  • Log Rotation: Automated log file management

  • Log Analysis: Pattern recognition and alerting

Performance Monitoring Resource Usage Tracking

bash
# Monitored performance metrics:
- CPU utilization per core
- Memory usage patterns
- Disk I/O statistics
- Network bandwidth utilization
- Process resource consumption
- System response times

Historical Data Collection

  • Performance Graphs: Historical performance charts

  • Trend Analysis: Long-term performance trends

  • Capacity Planning: Resource usage forecasting

  • Alerting Thresholds: Performance-based alerts