JSON at Work
Tom Marrs
Sally’s Cookie Addiction
Sally McKenney
Programming AWS Lambda
Mike Roberts & John Chapin
99 Bottles of OOP (Milk, PHP)
Sandi Metz & Katrina Owen & TJ Stankus
Practical Linux System Administration
Kenneth Hess
The Linux Philosophy for SysAdmins
David Both
Pro Linux System Administration
Dennis Matotek & James Turnbull & Peter Lieverdink
Using and Administering Linux: Volume 1
Using and Administering Linux: Volume 3
Using and Administering Linux: Volume 2
Principles of Network and System Administration 2nd Edition
Mark Burgess
UNIX and Linux System Administration Handbook
Evi Nemeth & Garth Snyder & Trent R. Hein & Ben Whaley
Essential System Administration
Æleen Frisch
SELinux User's and Administrator's Guide
Barbora Ančincová & Ioanna Gkioka & Tomáš Čapek & Mirek Jahoda