Section 7.9 nitpick

[randy@…]

Noted in the first paragraph:

"Each file has a specific use and may effect login and interactive environments differently."

s/effect/affect/

This is a common mistake, but one that is easy to remember. I've seen it a couple of times now. Perhaps a grep through the sources searching for 'effect' and 'affect' can be done to ensure there are not other instances of the misuse of either.