bibliographical info

[Ana Maria De Alvare]

>>1) good UNIX introductory books

I would suggest you  Groff and Weinberg book Called:
"Understanding UNIX- Conceptual Guide.,  It covers berkeley, system
V and Xenix too.

And for all the levels the Hayden publisher for the Waite Group 
books in UNIX.  They are good books that can refer to any problem
quickly.

Ana Mariaa De Alvare'
anamaria at lll-lcc.llnl.gov