Some more helpful stuff:
http://rapidshare.de/files/2605745/MCGraw-Hill_Osborne_HackNotes_Linux_and_Unix_Security_Portable_Reference.pdf.html
http://rapidshare.de/files/3198070/securingandoptimizinglinuxredhatedition.pdf.html
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With deviation from the convention, comes an invention.
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N. Rajagopal,
B.Tech - Industrial Biotechnology,
B.Tech - Information Technology(Dual degree),
Anna University, Guindy,
Chennai-600025, India.
Visit me at http://www.rajagopal.tk