As you might imagine, we often get asked the same questions, over and over. The perennial favorite of "It doesn't work!" is always good for a laugh; "NEWBIE NEEDS HELP!!!!!" is another. (If you want avoid being grouped with those who don't know enough to pick up the ringing Clue Phone, do yourself - and us - a favor and read our Ask The Gang HOWTO.) However, we also get asked lots of useful, interesting questions by people who have taken the time to think out what they want to say, and many of these are not only worth answering - they're worth preserving as reference material for others who might encounter the same problem.
NOTE: The information in the Knowledge Base loses its relevance as time goes on: syntax and usage become deprecated, tools get replaced by newer (and presumably better) tools, and writers look back at the code that they published years before and shrink in horror (this couldn't possibly be personal experience speaking, never!) Because of this effect, it is worth your while to read several articles on a given topic that you're researching, with preference generally given to the later ones in case of conflict (each category is more-or-less arranged by issue number in reverse order - from most recent to oldest.)
Good luck with your search!
Boot Loaders and Booting the OS
CD-ROM, Tape, Floppy and Other Storage Devices
Compiling Programs, Using C Libraries
GUI, X-Windows and Window Managers
Installing and Using Applications
Interoperability with other OSs
Network Adapters (Ethernet, etc.)
Programming in Other Languages
Switching from Other Operating Systems
System Startup: After the Boot up to the Login Prompt
The Answer Guy's Most Memorable Rants