adding folder and file for more command line and advanced command line tutorials

Author: matyikriszta

command-line/advanced-command-line/tutorial.md

@@ -0,0 +1,5 @@
+---
+layout: page
+title: Advanced command line
+---
+

command-line/command-line/tutorial.md

@@ -0,0 +1,6 @@
+---
+layout: page
+title: More command line
+---
+
+In the previous lesson we have learnt how to navigate the directories (folders) of our computer using the command line, and how to create directories and files. 

index.html

@@ -38,7 +38,9 @@ <h2>HTML</h2>
 
           <h2>Command Line</h2>
           <ul>
-            <li><a href="command-line/introduction/tutorial.html">Introduction to the command line</a></li>
+            <li><a href="command-line/introduction/tutorial.html">Lesson 1 - Introduction to the command line</a></li>
+            <li><a href="command-line/command-line/tutorial.html">Lesson 2 - More command line</a></li>
+            <li><a href="command-line/advanced-command-line/tutorial.html">Lesson 3 - Advanced command line</a></li>
           </ul>
 
           <h2>Version Control</h2>