Apache Web Server is a very stable and robust web server for the Linux Unix Mac Windows and other related operating systems that existed today.   There are also alternative installation packages that are free for downloads to the general public and are also very stable and robust too as well and these include the most popullar ones like XAMPP (runs on Linux, Windows, Mac and others) and WAMP (for Windows only).

The layout below show's the general setup flow to follow, when setting up a Web Server or HTTP server under Linux and as follows: