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+++ b/handbook/troggle/troglaptop.html
@@ -56,11 +56,34 @@ Windows Subsystem for Linux now packaged as a Microsoft Store app</a>,
       </ul>
 </ul>
 <p>Before you do anything else, get yourself set up with a <a href="../computing/keyexchange.html">key-pair</a> to access the software on the expo server properly.
+
+<h3>Directory (folder) structure</h3>
+<p>This is up to you of course, but a suggested structure is like this ("~" means your own user home folder, e.g. <var>/home/philip/</var>):
+<ul>
+  <li>~/expo
+    <ul>
+      <li>~/expo/troggle
+      <li>~/expo/expoweb
+      <li>~/expo/drawings
+      <li>~/expo/loser<br><br>
+        <li>~/expo/p13d5/  - python3.13 Django 5 (dev)
+        <li>~/expo/p11d3/  - python3.11 Django 3.2 (server mimic)
+      
+    </ul>
+</ul>
+<p>The install script (see below) will create the dev and server-mimic folders which will be virtual environments.
+  <p>Before the install scripts work on a bare Ubuntu installation, you will need to have git installed. This is in-built on Ubuntu 24.04 but on other (and earlier) Linux distros you will need to do:
+    <br><var>sudo apt intall git</var>
+<br> manually.
+
 <p>There are two scripts in the <var>troggle</var> folder which will do semi-automatically what is described below. Have a look at
   <ul>
     <li><var>os-trog.sh</var>
     <li><var>venv-trog.sh</var>
   </ul>
+which you can read without installing by looking at:<br>
+
+
 <p>You will run <var>os-trog.sh</var> just once to install the basics, but you will run <var>venv-trog.sh</var> every time you fire up a new python version/django version combination or play with the versions of the imported packages as listed in <var>requirements.txt</var>.
   <p><var>os-trog.sh</var> takes a few minutes initially, but then about an hour when it installs therion and tunnel as these drag in a huge number of dependencies.
 <h3>Files and directories</h3>