When booting from the server or alternative install CD, there are some choices tied to function keys (F4, F6, etc.) along the bottom of the screen. Some are relatively obvious, others... not so much so, or least it'd sure be nice to be able to read a description of what the intended usage is before committing to an install process only to find that I should have left well enough alone ;)
I can't seem to find a description of these options in the official documentation... anyone know where it might be squirreled away, or who I could get ahold of to find out?
The boot options for the desktop CD are documented (incompletely) at https://help.ubuntu.com/community/BootOptions; there doesn't seem to be a page for the server CD, but many options are the same.
Don't worry too much about these options: for the most part, you're not expected to understand them. Apart from the obvious ones like choosing a different keyboard layout or choosing between doing an installation, a rescue or a memory test, most options are intended for poorly-supported hardware or highly unusual requirements. If an option isn't listed on that BootOptions page, the expected workflow is to try booting, find that it doesn't work, enlist the help of Google or a guru to diagnose the problem, and learn that the problem can be worked around by adding the
more_magic=xyzzy
option.