Originally posted here by Tedob1
hacking exposed is really a good recomendation, if your running NT. (haven't looked threw the later editions)
I have, they are worth the money if you buy them in sets on ebay, some guy had all sets starting out at $5 out bid at $44.


I recommend all these.
"Computer Networks" - Andrew S. Tanenbaum
"Operating Systems" - Andrew S. Tanenbaum
"TCP/IP Illustrated" (volumes I-III) - W. Richard Stevens
"Advanced Programming in the UNIX Environment" - W. Richard Stevens
"UNIX Network Programming" (volumes I and II) - W. Richard Stevens
"UNIX System Administration Handbook" - Evi Nemeth
"Practical UNIX and Internet Security" - Simson Garfinkel
"Building Open Source Network Security Solutions" - Mike Schiffman
"Hacking Linux Exposed"
"Linux System Administrators Handbook"
"Practical UNIX and Internet Security"
Best there is for the basics/*nix basics