LPIC-2: Linux Professional Institute Certification Study Guide: Exam 201 and Exam 202, Edition 2

LPIC-1 Linux Professional Institute Certification Study Guide: Exam 101-500 and Exam 102-500, Edition 5

LPIC-1 Linux Professional Institute Certification Study Guide: Exam 101-500 and Exam 102-500, Edition 5

CompTIA Linux+ Study Guide: Exam XK0-005, Edition 5

Mastering Linux System Administration

LPI Linux Essentials Study Guide: Exam 010 v1.6, Edition 3

LPI Linux Essentials Study Guide: Exam 010 v1.6, Edition 3

Linux Essentials: Edition 2

Linux Essentials: Edition 2

Linux Command Line and Shell Scripting Bible: Edition 4

Linux Command Line and Shell Scripting Bible: Edition 4