The Book of PF: A No-Nonsense Guide to the OpenBSD Firewall
Peter N. M. Hansteen
Peru
Carolyn McCarthy & Carolina A Miranda & Kevin Raub & Brendan Sainsbury & Luke Waterson
Networking the Complete Reference, Third Edition
Bobbi Sandberg
Docker Deep Dive
Nigel Poulton
Linux Administration: A Beginner's Guide, Fifth Edition
Wale Soyinka