added sections

README.md

@@ -11,7 +11,6 @@ tilde.town.
 # Table of contents
 
 <!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-refresh-toc -->
-
 - [Requirements](#requirements)
 - [Conventions used in this handbook](#conventions-used-in-this-handbook)
 - [Getting started](#getting-started)
@@ -50,8 +49,7 @@ tilde.town.
 # Conventions used in this handbook
 
 * **Notes** signify additional information.
-* **Tips** signify alternative methods to procedures.
-* **Examples** provide a visual reference of how a procedure would be carried out in the real world.
+* **Tips** signify alternative methods to procedures. * **Examples** provide a visual reference of how a procedure would be carried out in the real world.
 * **Monospaced font** signifies directory names, file names, file contents, and commands.
 
 # Getting started
@@ -137,6 +135,16 @@ being sent to your screen.
 
 # Understanding UNIX-related concepts
 
+This section will teach you the concepts required to follow further
+sections in this handbook.
+
+This section consists of the following subsections:
+
+- [Understanding your home directory](#understanding-your-home-directory)
+- [Understanding directory and file permissions](#understanding-directory-and-file-permissions)
+- [Understanding commands](#understanding-commands)
+- [Understanding package managers](#understanding-package-managers)
+
 ## Understanding your home directory
 
 ## Understanding directory and file permissions