Linux 
Linux

Linux

Ubuntu Unleashed 2017 Edition (2017)

Learning Ubuntu: A Beginners Guide to Using Linux (2016)

Linux Administration (2016)

CompTIA Linux+ / LPIC-1 Cert Guide (Exams LX0-103 & LX0-104/101-400 & 102-400) (2016)

Linux Web Server Development (2015)

Ansible for DevOps: Server and configuration management for humans (2015)

The GNU Make Book (2015)

How Linux Works: What Every Superuser Should Know (2015)

Ubuntu 15.04 Server with systemd: Administration and Reference (2015)

Pro Bash Programming: Scripting the GNU/Linux Shell, Second Edition (2015)

Linux Bible 9th Ed (2015)

Wiley Linux Command Line and Shell Scripting Bible 3rd (2015)

Beginning the Linux Command Line, Second edition (2015)

Learn Linux in 3 Days (2015)

LINUX: Easy Linux For Beginners, Your Step-By-Step Guide to Learning The Linux Operating System and Command Line (2015)

RHCSA & RHCE Red Hat Enterprise Linux 7: Training and Exam Preparation Guide (EX200 and EX300), Third Edition (2015)

LINUX: The Ultimate Beginner’s Guide! (2015)

Ubuntu: Questions and Answers (2014)

Command Line Kung Fu (2014)

Linux All-in-One For Dummies, 5th Edition (2014)

Linux Kernel Networking: Implementation and Theory (2014)

A practical guide to Fedora and Red Hat Enterprise Linux, 7th Edition (2014)

Ubuntu Linux Toolbox: 1000+ Commands for Power Users (2013)

The Linux Command Line (2012)

Linux Nitty Gritty: Working at the Ubuntu Command-Line Prompt (2011)

The Official Ubuntu Book (2011)

Ubuntu Hacks: Tips & Tools for Exploring, Using, and Tuning Linux (2009)

Running Linux, 5th Edition (2009)

UNIX: The Complete Reference (2007)

Ubuntu Linux For Dummies (2007)

Hacking Ubuntu (2007)