To make ASP run under Linux, PHP script files are saved as ASP extensions and are redirected to the PHP interpreter. So it looks like the server serves ASP files, but these are actually PHP scripts.
Recently technology has emerged by which you can run asp pages on a linux server. Apache is an example. You can even run asp.net pages on linux server.The latest development is Mono Project which allows you to run asp.net pages on linux server.
As far as asp pages is concerned you can visit the following site to get more info.
Is it possible to run ASP under LINUX
