Secure your Linux machines and keep them secured with over 50 hands-on recipes to create and administer a secure Linux system locally as well as on a network. You can get the ebook free of charge (a $25 value) with your email address or by connecting via LinkedIn. The offer is good only for a limited time.

Learn to code like a professional with Python - an open source, versatile, and powerful programming language. You can get the ebook free of charge (a $40 value) with your email address or by connecting via LinkedIn. The offer is good only for a limited time.

Written for professionals and college students, this handbook compiles advice from experts working in the real world about how to minimize the possibility of computer security breaches in your systems. With positive reviews on Amazon (sold for about $120), this is a great opportunity to grab it on ebook format free of charge. Use your email address or connect via LinkedIn. The offer is good only until May 10.