Backing this up and taking a break for now

README.md

@@ -21,6 +21,10 @@ tilde.town.
     - [For PuTTY users](#for-putty-users)
     - [Testing out your command line interface](#testing-out-your-command-line-interface)
 - [Understanding your home directory](#understanding-your-home-directory)
+- [Understanding directory and file permissions](#understanding-directory-and-file-permissions)
+- [Understanding commands](#understanding-commands)
+- [Basic UNIX commands](#basic-unix-commands)
+
 <!-- markdown-toc end -->
 
 # Requirements
@@ -129,3 +133,9 @@ representing your files and directories is the data, and that text is
 being sent to your screen.
 
 # Understanding your home directory
+
+# Understanding directory and file permissions
+
+# Understanding commands
+
+# Basic UNIX commands