Web book editing (#2139)

* replace conjunctions with words as much as possible
* RockyLinux = Rocky Linux
* simplify sentences
* remove passive voice as much as possible
* remove some hard tabs (not allowed with markdown linters)
* fix no bare URL rule tripping by adding < >
* fix no duplicate headings by replacing one "Generalities" with "Introduction"

Author: sspencerwire

docs/books/web_services/00-toc.md

@@ -8,19 +8,19 @@ tags:
 ---
 <!-- markdownlint-disable MD025 MD007 -->
 
-RockyLinux is part of the Enterprise Linux family, making it particularly well suited to hosting web services such as file servers (FTP, sFTP), web servers (apache, nginx), application servers (PHP, Python), database servers (MariaDB, Mysql, PostgreSQL) or more specific services such as load balancing, caching, proxyfication or reverse proxyfication (HAProxy, Varnish, Squid).
+Rocky Linux is part of the Enterprise Linux family, making it particularly well suited to hosting web services such as file servers (FTP, sFTP), web servers (apache, nginx), application servers (PHP, Python), database servers (MariaDB, Mysql, PostgreSQL) or more specific services such as load balancing, caching, proxy or reverse proxy (HAProxy, Varnish, Squid).
 
-The web wouldn't be what it is without email. Web services generally make extensive use of mail servers (Postfix).
+The web would not be what it is without email. Web services generally make extensive use of mail servers (Postfix).
 
-Sometimes, these services are extremely busy or require highly available services. In these cases, other services can be implemented to guarantee optimal service performance (Heartbeat, PCS).
+Sometimes these services are extremely busy or require highly available services. In these cases, other services can be implemented to guarantee optimal service performance (Heartbeat, PCS).
 
 Each chapter of this book can be consulted independently, according to your needs, and it is not compulsory to read the chapters in order.
 
-This book is also part of a series of books dedicated to system administration under Linux (Admin Guide, Learning Bash, Learning Ansible). Where necessary, you'll be invited to review the concepts you're missing in the corresponding chapters of the above-mentioned books.
+This book is also part of a series of books dedicated to system administration under Linux (Admin Guide, Learning Bash, Learning Ansible). Where necessary, you will be invited to review the concepts you may be missing in the corresponding chapters of the above-mentioned books.
 
 ## Public
 
-The target audience for this book is system administrators already trained in the use of system administration commands (see our book Admin Guide), who want to install, configure and secure their web services.
+The target audience for this book is system administrators already trained in the use of system administration commands (see [our book Admin Guide](../admin_guide/00-toc.md)), who want to install, configure and secure their web services.
 
 ## How to use this book