TradePub is again offering 9to5 readers the opportunity to download three eBooks to help in your professional life for FREE. The only catch? You have to fill out a short form to get to the download area. Below you’ll find the three titles available:

Linux Server Security: Hack and Defend presents a detailed guide for experienced admins, aspiring hackers and other IT professionals seeking a more advanced understanding of Linux security. Written by a 20-year veteran of Linux server deployment this book provides the insight of experience along with highly practical instruction.

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