"Figuring out Linux host performance issues is time-consuming without the right tools. The top, vmstat, iostat, free and sar commands can help get CPU, device and memory data," writes James Turnbull
"Performance management on Linux hosts is a task that takes time, knowledge of the command-line interface and a little bit of intuition. As a system administrator, you might rarely venture beyond the few commands you're familiar with or simply throw hardware, more memory and more CPU at perceived performance problems..."
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