Up2date/Yum - Information.

[Diahron Grismore <diahron@xxxxxxxxxxxxx>]

Excuse the denseness about the use of up2date and/or yum but I need to 
know a few things that will help me and perhaps others. (coming from the 
other side of the tracks.)
1. Where, if there are, information on the setup, use and understanding 
of up2date/yum settings?
2. When doing an update/install, do not the system create backups that 
you can revert to in case of crashes? If so, where would they be?
3.  Is it possible to delete header files on standalone system and have 
it to auto-recreate itself?
I've looked at Fedora-Us site, which have information on yum and the 
others, however, the info only covers up to FC2. Is it just a matter of 
sub'ng FC2 with FC3? Anything can be figured out in time, but I really 
hate trying to  reinvent the wheel when the instructions just feel out 
the box behind me.