How to install Apache, MySQL and PHP (LAMP) in Ubuntu

For details you can Head over at http://www.devolio.com/blog/archives/221-How-to-install-Apache,-MySQL-and-PHP-LAMP-in-Ubuntu-7.10.html

ab - Apache HTTP server benchmarking tool

ab is a tool for benchmarking your Apache Hypertext Transfer Protocol (HTTP) server. It is designed to give you an impression of how your current Apache installation performs. This especially shows you how many requests per second your Apache installation is capable of serving.

You can find more details on how to use benchmark tool in below mentioned link.

Reference:

http://www.cyberciti.biz/tips/howto-performance-benchmarks-a-web-server.html