Linux Optimization primarily focus on server operating system optimization by managing resources and there are always other practical ways to solve the situations more faster. 5 Years ago, Linux optimization was nothing else kernel compilation but the worst things always sets the conditions, kernel is not one of them.
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IMPORTANT NOTE: This document is prepared for CentOS 5.6 and ment to work with other versions and distros.Never assume the directory structures exist in your system as written in the document. Never blindly follow security instructions — read, review, compare, apply as it fits your system.