The Basics of Hacking and Penetration Testing
Patrick Engebreson
UNIX and Linux System Administration Handbook, 5E
Evi Nemeth & Garth Snyder & Trent R. Hein & Ben Whaley & Dan Mackin
Learning Linux Shell Scripting
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1-100 Transistor Circuits
The Well-Grounded Java Developer
Benjamin J. Evans and Martijn Verburg
Hacking; The Art of Exploration
Jon Erickson