Hi,
How could i run asp or aspx pages on unix sever
What i need ?

For .NET pages - I am pretty certain the answer is you cannot.

For ASP pages, you might check out ChiliSoft: http://wwws.sun.com/software/chilisoft/ - but some ASP pages will not work with this depending on the application.

About the closest I have heard as far as aspx is Mono: http://www.gotmono.com/

<edit>For Linux</edit>

I won't recommend Mono for the production environments because of the performance overheads and its initial stages.