Also keep in mind no tutorial can possibly cover every eventuality - while dealing with different platforms and Linux distributions, not to mention hosting companies' interfaces and internal procedures a great lot of things can go differently than the original write-up. We're not even talking about errors per se, just... stuff where you need someone with a minimal understanding of Linux (or, in some cases, the specific MU* codebase you are setting up) to remove small roadblocks.
But that's why having a community comes in handy. If you have a specific problem, ask.