Here are some books that I recommend reading.
DNS and Bind by Cricket Liu and Paul Albitz
The Internet runs on DNS and search engines. And also the famous joke “It is always the DNS”
Scalable Web Architecture and Distributed Systems by Kate Matsudaira link
This book covers how large Internet applications are deployed to service thousands of users.
The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography
As in the title. Regular patterns will help hackers to break the cypher.
Pro Git by Scott Chacon and Ben Straub
GIT is a version control software that is the backbone of any software development. Without it will be a painful endeavour. link