Overview

This lesson covers the tools and techniques used to monitor how well UNIX servers are performing and how data moves across networks. You'll learn to identify bottlenecks, measure resource usage, and troubleshoot problems that affect system speed and reliability.

Key Points

• Use command-line tools like top, ps, and vmstat to track CPU, memory, and process activity in real time
• Monitor network traffic and connections with tools such as netstat, ss, and tcpdump to diagnose connectivity issues
• Understand key performance metrics including load average, disk I/O, and network throughput
• Interpret system logs and performance data to identify and resolve bottlenecks
• Apply monitoring best practices to maintain server health and prevent downtime

Why This Matters

System administrators and IT professionals rely on performance monitoring to keep servers running smoothly, prevent outages, and ensure users have fast, reliable access to services. Understanding these tools is essential for any career in IT operations or network management.

Suggested Next Steps

• UNIX System Administration Fundamentals
• Network Protocols and Troubleshooting
• Server Capacity Planning and Optimization

Sources

• The Linux Command Line by William E. Shotts Jr.
• UNIX and Linux System Administration Handbook by Evi Nemeth et al.