Please Guide me ( Unix and Windows Severs)

hi, I m working on a site which is to be hosted on a unix or linux server, but the idea which i don't have is the difference between the unix/linux and windows server, i wonder there is no difference in the php scripts, but the only difference will be the configuration of php on windows and unix/linux. plz correct me if i m wrong the other confusion which i have in my mind is , the standard configuration of php in various windows and Linux/Unix servers about the "session.auto_start" is it set to 1 or 0 this is i m asking because i have never hosting a site designed in php but a lot of sites in ASP , in asp there is always session is autostart. so , If i m developing a site on my local sever ( My PC ) with the configuration of session.auto_start=1 then if i host it, it might create error, because when i set ( session.auto_start=0) and wrote session_start(); on each page explicitly, it was creating a lot of errors, so i set (session.auto_start=1) and worked fine. plz guide me. --------------------------------- Do you Yahoo!? HotJobs - Search new jobs daily now