Admin Tools Overview

The Admin Tools package provides comprehensive system monitoring, alerting, and management capabilities for Linux systems. These scripts help maintain system health and optimize performance.

Main Scripts

1. system-monitor.sh

Real-time system monitoring and alerting:

# Interactive monitoring dashboard
./system-monitor.sh

# Background monitoring with alerts
./system-monitor.sh --daemon --config /etc/monitor-config.yml

# Quick system health check
./system-monitor.sh --health-check

Options:

--daemon         Run in background mode
--alert-level    Set alert threshold (low|medium|high)
--metrics        Specify metrics to monitor
--interval       Check interval in seconds
--notify         Email or Slack notification settings

2. resource-manager.sh

Resource usage monitoring and management:

# Check current resource usage
./resource-manager.sh --status

# Set resource limits
./resource-manager.sh --limit-cpu 80 --limit-memory 90

# Generate resource report
./resource-manager.sh --report daily

3. log-analyzer.sh

Advanced log analysis and reporting:

# Real-time log monitoring
./log-analyzer.sh --follow /var/log/syslog

# Generate log summary
./log-analyzer.sh --summary --last 24h

# Search for specific patterns
./log-analyzer.sh --pattern "error|failed" --services nginx,mysql

Configuration

Example monitoring configuration:

# /etc/monitor-config.yml
monitoring:
  metrics:
    - cpu_usage
    - memory_usage
    - disk_usage
    - load_average
    - network_traffic
    - open_files
    - process_count

  thresholds:
    cpu:
      warning: 80
      critical: 90
    memory:
      warning: 85
      critical: 95
    disk:
      warning: 85
      critical: 90

  services:
    - name: nginx
      port: 80
      process: nginx
    - name: mysql
      port: 3306
      process: mysqld

alerts:
  email:
    enabled: true
    recipients:
      - admin@company.com
      - oncall@company.com
  slack:
    enabled: true
    webhook: https://hooks.slack.com/...
    channel: "#server-alerts"

logging:
  level: info
  file: /var/log/system-monitor.log
  rotate: daily
  retain: 30

Common Use Cases

1. Production Server Monitoring

./system-monitor.sh \
  --daemon \
  --metrics cpu,memory,disk,network \
  --alert-level medium \
  --notify slack \
  --interval 60

2. Log Analysis

./log-analyzer.sh \
  --services nginx,php-fpm \
  --pattern "error|failed|critical" \
  --last 6h \
  --report-format html \
  --output /var/www/reports/

3. Resource Optimization

./resource-manager.sh \
  --optimize \
  --target-services mysql,nginx \
  --apply-recommendations

Best Practices

1. Monitoring Setup

   • Set appropriate thresholds
   • Configure multiple notification methods
   • Use different alert levels for different environments

2. Resource Management

   • Regular performance audits
   • Implement automated responses
   • Document baseline metrics

3. Log Management

   • Centralize log collection
   • Set up log rotation
   • Regular log analysis

Troubleshooting

Common issues and solutions:

1. High Resource Usage

   # Identify top consumers
   ./resource-manager.sh --top-processes
   
   # Generate optimization report
   ./resource-manager.sh --analyze-usage
   

2. Alert Storm

   # Adjust thresholds
   ./system-monitor.sh --reconfigure-alerts
   
   # Check alert history
   ./system-monitor.sh --alert-history
   

3. Service Issues

   # Service health check
   ./system-monitor.sh --service-check all
   
   # Auto-recovery attempt
   ./system-monitor.sh --auto-recover
   

Security Features

1. Access Control

   • Role-based access
   • Audit logging
   • Secure remote monitoring

2. Data Protection

   • Encrypted metrics storage
   • Secure communication
   • Data retention policies

Next Steps

• Advanced Monitoring
• Alert Configuration
• Performance Tuning
• Security Hardening