2) I think this is a bit like asking, "Why isn't there a comprehensive guide to art" Infra is massively complicated. Not only do you have competing frameworks/

2) I think this is a bit like asking, "Why isn't there a comprehensive guide to art" Infra is massively complicated. Not only do you have competing frameworks/modules, you also have these change in different releases of Linux. Some of these are simpler, some are more comprehensive. Some are really hard to use but powerful/well-maintained, others are simple but might not be so good. Some perform well at a cost, others might perform relatively less well but are easier. Sometimes it is worth the effort setting up ufw on a server, sometimes it isn't. BY the time you got to something that was simple enough to create a guide from, and which didn't change each week when some vendor renames a configuration option, it would be very high-level and possibly not very useful.