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The Linux Programming Interface: A Linux and UNIX System Programming Handbook

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Linux Kernel Development: Edition 3

Efficient Linux at the Command Line: Boost Your Command-Line Skills

Understanding the Linux Kernel: From I/O Ports to Process Management, Edition 3

Linux Pocket Guide: Edition 4

Linux System Programming: Talking Directly to the Kernel and C Library, Edition 2

Linux iptables Pocket Reference: Firewalls, NAT & Accounting

Linux Basics for Hackers: Getting Started with Networking, Scripting, and Security in Kali

Penetration Testing with Raspberry Pi

The Design and Implementation of the FreeBSD Operating System: Edition 2

XDA Developers' Android Hacker's Toolkit: The Complete Guide to Rooting, ROMs and Theming

How Linux Works, 3rd Edition: What Every Superuser Should Know

Mastering Windows Server 2012 R2

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Linux in a Nutshell: A Desktop Quick Reference, Edition 6