OpenStack Operations Guide
Tom Fifield & Lorin Hochstein & Jonathan Proulx & Everett Toews & Diane Fleming & Joe Topjian & Anne Gentle
El Cerebro de Broca
Carl Sagan
Operating System Concepts 7th Edition
Abraham Silberschatz & Peter B. Galvin & Greg Gagne
Operating System Concepts (3)
PostgreSQL Replication
Zoltan Boszormenyi & Hans-Jürgen Schönig
Networking for Systems Administrators (IT Mastery) (Volume 5)
Michael W Lucas