Comptia Linux+ Certification [with Cdrom]
Mike Meyers Linux+ Certification Passport »

Rhcsa/Rhce Red Hat Linux Certification Study Guide (Exams Ex200 & Ex300)
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Ubuntu Certified Professional Study Guide (exam Lpi 199) [with Cdrom]
Ubuntu Certified Professional Study Guide »

Lpic-1 In Depth
LPIC-1 in Depth »

Mike Meyers' Linux+ Certification Passport
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Linux Networking Clearly Explained
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Linux Patch Management
Keeping Linux Systems Up to Date »

Ubuntu Certified Professional Study Guide (Exam Lpi 199)
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Mastering Red Hat Linux 9
Whether you depend on Linux as a server or desktop OS, Mastering Red Hat Linux 9 gives you the practical information you need to install, configure, and admi... »