Cpu Load

http://blog.scoutapp.com/articles/2009/07/31/understanding-load-averages
http://www.linuxjournal.com/article/9001
http://en.wikipedia.org/wiki/Load_%28computing%29

http://digg.com/linux_unix/Linux_tip_How_do_I_find_out_Linux_CPU_utilization
http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html





some more ref:
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http://cpulimit.sourceforge.net/


http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html

http://www.cyberciti.biz/tips/linux-limiting-or-restricting-smp-cpu-activation-in-smp-mode.html

http://www.cyberciti.biz/faq/cpu-usage-limiter-for-linux/

boot parameter:
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http://www.cyberciti.biz/tips/10-boot-time-parameters-you-should-know-about-the-linux-kernel.html


security:
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http://www.cyberciti.biz/tips/linux-security.html