Protecting the root account at all costs on Unix Systems.  In my
opinon the root account is the single most important thing on
any Unix machine, regardless of the data that may be on the
machine. Once it has been compromised there is always
uncertainty about the integrity of the system. I have just a
couple of suggestions here for those of you who run Unix ( this
includes Linux ofcourse).  There are quite a few neat little
things that we can do to help ourselves as administrators to
protect the root account. I am only listing a few here, but
perhaps it will spark some good discussion from your experiences
on other methods.  1. The su command  su is an old favorite to
attack in root-kits on Unix machines. Essentially it can be
trojaned with something * extra * often to cat or redirect the
root password to another file. Let me begin by showing a simple
example of how such an exploit could be carried out.  This is a
very simple shell script that would upon execution simulate the
real command su to capture the ro