There are several programs that make Linux easy to setup and configure. Some are becoming sort of standard: Red Hat, Caldera and other distributions ship with apps like
usertool, etc, while S.u.S.E. ships with a comprehensive configuration program called Yast. Other useful programs are:
procmailand more. Its page is at http://www.imada.ou.dk/~blackie/dotfile;
Documents on Linux configuration are popping up everywhere. One of the most complete is TrinityOS, http://www.ecst.csuchico.edu/~dranch/LINUX/index-linux.html. Bug the author to have him turn the document in nicer formats.
A jolly good page is http://dotfiles.com. Just what it says - a collection of configuration files.