CentOS 6 Linux Server Cookbook
Jonathan Hobson
VMware Private Cloud Computing With vCloud Director
Simon Gallagher & Aidan Dalgleish
Puppet Cookbook - Third Edition
Thomas Uphill
A World Without Time: The Forgotten Legacy of Godel and Einstein
Palle Yourgrau
Shell Scripting
Steve Parker
Learning the Bash Shell: Unix Shell Programming
Cameron Newham & Bill Rosenblatt