A large system of configuration commands and syntax is a useful and powerful tool for allowing people to easily control complex pieces of computer software.Large configuration files have one major problem; you tend not to look at them often enough to get the language and syntax down pat. You find yourself making too many tiny errors in command name or syntax and struggle with one window editing the file and one or more windows open displaying the documentation.
With Apache I have this problem in spades. The configuration system may be well designed and the syntax as easy as possible, but most people will still struggle to keep every detail in their head. I know what I need to do, have a fair idea how to do it, but the details elude me.
That's where this little volume comes in immensely handy. I have several of O'Reilly's pocket references and find the PHP, Apache and Perl ones never stray far from my computer. This one provides a wealth of reference information packed into a small, inexpensive little volume. It has enough information about the exact name and sytax of the Apache configuration directives that I don�t need to go to a larger book or delve into the manual.
Oh, and for those that want this volume to lay flat. I ran my copy through a paper cutter and trimmed the spine off. After punching holes in the pages I then had a loose leaf version that allowed me to add my own pages of notes in various spots and lays perfectly flat. It only took a few minutes. Sorry, O'Reilly - but it is more useful if it can lay flat and being able to add notes is great.