Regardless, Hunt's book is still one of the best UNIX sys admin books ever written. The second edition has all the strengths of the first. Moreover, it still fills a real need, though a different one. Hunt was an evangelist. Well, the world is converted and we need a tour guide.
Hunt is now that tour guide.
In my view, good security is good system administration and vice versa. Most of this chapter is just common-sense advice. It is probably sufficient for most circumstances, but certainly not all. Make sure you know whether there is an existing security policy that applies to your network or system. If there are policies, regulations, or laws governing your situation, make sure to obey them.