Red Hat RHCE 8 (EX294) Cert Guide
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Mastering Chef
Mayank Joshi
Advanced Programming in the UNIX Environment
W. Richard Stevens & Stephen A. Rago
Securing DevOps: Safe Services in the Cloud
Julien Vehent
Mastering Parallel Programming With R
Simon R. Chapple & Eilidh Troup & Thorsten Forster & Terence Sloan
Mastering Java 9
Martin Toshev