C Primer Plus
Stephen Prata
Ipv6 Essentials
Silvia Hagen
The Practice of Cloud System Administration: Designing and Operating ...
Thomas A. Limoncelli & Strata R. Chalup & Christina J. Hogan
The Practice of System Administration (2)
A Concise Introduction to Logic
Patrick Hurley
Rake Task Management Essentials
Andrey Koleshko