Summary
This guide presents a systematic approach to analyzing performance issues on a Linux server within the first 60 seconds of logging in. It outlines ten essential commands that can be executed to quickly assess system resource usage and identify potential problems. The commands include 'uptime', 'dmesg | tail', 'vmstat', 'mpstat', 'pidstat', 'iostat', 'free', and 'sar', among others. Each command provides specific metrics that help in evaluating system performance, such as CPU load, memory usage, and I/O statistics. The guide emphasizes the importance of checking for errors and saturation metrics, which indicate whether resources are being overutilized. Additionally, it introduces the USE Method, a framework for locating performance bottlenecks by examining utilization, saturation, and error metrics across various system resources. The document serves as a practical reference for system administrators and engineers looking to optimize Linux server performance.
