135 lines
4.0 KiB
Markdown
135 lines
4.0 KiB
Markdown
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# Linux Network Performance Monitoring
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Linux Network Performance Monitoring: A Comprehensive Guide
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## 1. Introduction
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- Importance of network performance monitoring
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- Overview of Linux tools and techniques
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## 2. Key Network Performance Metrics
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- Bandwidth
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- Latency
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- Packet loss
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- Throughput
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- Jitter
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- Connection states
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## 3. Built-in Linux Commands for Network Monitoring
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### ping
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- Basic usage and interpretation
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- Advanced options (interval, packet size, flood ping)
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### traceroute / tracepath
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- Tracing network path and identifying bottlenecks
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- Understanding output and hop analysis
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### netstat
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- Monitoring network connections and routing tables
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- Useful options and real-time monitoring
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### ss (Socket Statistics)
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- Modern replacement for netstat
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- Monitoring TCP, UDP, and UNIX socket connections
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### ip
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- Configuring and monitoring network interfaces
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- Viewing routing information and ARP cache
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## 4. Advanced Command-line Tools
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### iftop
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- Real-time bandwidth usage monitoring per connection
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- Installation and usage guide
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### iptraf
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- Interactive colorful IP LAN monitor
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- Detailed statistics on various network protocols
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### nethogs
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- Monitoring per-process network usage
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- Identifying bandwidth-hungry applications
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### tcpdump
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- Packet capture and analysis
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- Filtering options and output interpretation
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### nload
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- Monitoring network traffic and bandwidth usage in real-time
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- Graphical representation in the terminal
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## 5. System-wide Monitoring Tools
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### Nagios
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- Overview and setup
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- Configuring network performance checks
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- Alerts and notifications
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### Zabbix
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- Installation and configuration
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- Creating network monitoring templates
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- Visualization and reporting
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### Prometheus + Grafana
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- Setting up Prometheus for metrics collection
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- Configuring Grafana dashboards for network visualization
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- Creating custom alerts
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## 6. Specialized Network Monitoring Tools
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### Wireshark
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- GUI-based packet analyzer
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- Capture and analysis techniques
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- Protocol-specific analysis
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### nmap
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- Network discovery and security auditing
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- Port scanning and OS fingerprinting
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### iperf / iperf3
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- Network performance testing
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- Measuring maximum achievable bandwidth
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## 7. Kernel Tuning for Network Performance
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### sysctl parameters
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- TCP/IP stack optimization
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- Buffer sizes and connection handling
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### Network interface configuration
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- MTU optimization
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- TCP segmentation offload (TSO)
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- Interrupt coalescing
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## 8. Log Analysis for Network Performance
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- Important log files (/var/log/syslog, /var/log/messages)
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- Using tools like logwatch and fail2ban
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- Centralized logging with ELK stack (Elasticsearch, Logstash, Kibana)
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## 9. Automating Network Performance Monitoring
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- Writing shell scripts for regular checks
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- Using cron jobs for scheduled monitoring
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- Developing custom monitoring solutions with Python
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## 10. Best Practices
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- Establishing baselines
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- Regular performance audits
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10.3. Documentation and change management
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10.4. Capacity planning
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## 11. Troubleshooting Common Network Performance Issues
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- High latency
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- Packet loss
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- DNS resolution problems
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- Bandwidth saturation
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- Network congestion
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## 12. Case Studies
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- Identifying a network bottleneck in a web server setup
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- Troubleshooting intermittent connectivity issues
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- Optimizing network performance for a large-scale database cluster
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## 13. Future Trends in Linux Network Performance Monitoring
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- AI/ML-based anomaly detection
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- Container and microservices monitoring
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- Cloud-native monitoring solutions
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## 14. Conclusion
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- Recap of key points
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- Importance of continuous monitoring and optimization
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