--- doc/build/ubuntu12LTS_install.frag	2012/07/30 13:04:37	1.1
+++ doc/build/ubuntu12LTS_install.frag	2021/01/09 03:26:20	1.3
@@ -33,10 +33,10 @@ The installation process takes the follo
   <li><a href="#log">Log in to LON-CAPA</a></li>
 </ol>
 
-<hr />
+<hr>
 <h2>1. <a name="obt">Obtain Ubuntu 12.04 LTS .iso file</a></h2>
 <p>
-Ubuntu 12.04 LTS (server install) isos can be obtained from the <a href="http://www.ubuntu.com/download/server/download">Ubuntu Server download</a> page<br />
+Ubuntu 12.04 LTS (server install) isos can be obtained from the <a href="http://www.ubuntu.com/download/server/download">Ubuntu Server download</a> page<br>
 An .iso file (either 32 bit or 64 bit) can be burned to a CD. 
 </p>
 
@@ -56,7 +56,7 @@ DHCP is <em>not</em> supported.
 
 <h2>3. <a name="lin">Ubuntu 12.04 LTS installation</a></h2>
 <p>
-Installing Ubuntu Linux is easy.
+Installing Ubuntu Linux is straightforward.
 Documentation is available from
 <a href="https://help.ubuntu.com/community/Installation">https://help.ubuntu.com/community/Installation/</a>
 Most of the installation screens are self explanatory.
@@ -86,12 +86,13 @@ There are a few steps that require comme
    <dd>The base system will be installed. Once that is complete you will have the option to select additional software collections. Leave all unselected.</dd>
 </dl>
 <p>
-
 Finish installing your server, reboot it, and log in with the username you created during installation.
-  <dt>Firewall Configuration</dt>
-   <dd>Use ufw to allow incoming traffic for the following services: 
-       ssh, www, https
-   </dd>
+</p>
+<h3>Firewall Configuration</h3>
+<p>
+Use ufw to allow incoming traffic for the following services:
+ssh, www, https
+</p>
 <pre>
 sudo ufw default deny
 sudo ufw enable
@@ -99,17 +100,20 @@ sudo ufw allow ssh
 sudo ufw allow www
 sudo ufw allow https
 </pre>
-   <dt>E-mail: Postfix Installation</dt>
-   <dd>Configure to "Internet Site" to allow LON-CAPA to send e-mail to users.</dd>
+<h3>E-mail: Postfix Installation</h3>
+<p>
+Configure to "Internet Site" to allow LON-CAPA to send e-mail to users.
+</p>
 <pre>
 sudo apt-get install postfix
 </pre>
-   <dt>E-mail: Postfix Configuration</dt>
-   <dd>If you need to change the postfix configuration in the future use:<dd>
+<h3>E-mail: Postfix Configuration</h3>
+<p>
+If you need to change the postfix configuration in the future use:
+</p>
 <pre>
 sudo dpkg-reconfigure postfix
 </pre>
-</p>
 
 <h2>4. <a name="upd">Update your system</a></h2>
 <p>
@@ -122,13 +126,6 @@ sudo apt-get upgrade
 <p>
 If kernel packages were updated, reboot your system before continuing with the installation.
 </p>
-<p>
-Add LON-CAPA ubuntu repository to your /etc/apt/sources.list file. 
-</p>
-<pre>
-sudo apt-get install python-software-properties
-sudo apt-add-repository 'deb http://install.loncapa.org/ubuntu precise main'
-</pre>
 <h2>5. <a name="ilc">Installing LON-CAPA</a></h2>
 <h3>Import the LON-CAPA encryption key</h3>
 <pre>
@@ -136,6 +133,18 @@ wget http://install.loncapa.org/versions
 sudo apt-key add APT-GPG-KEY-loncapa.asc
 sudo apt-get update
 </pre>
+<h3>Add LON-CAPA ubuntu repository to /etc/apt/sources.list</h3>
+<p> Execute: </p>
+<pre>
+sudo apt-get install python-software-properties
+sudo apt-add-repository 'deb http://install.loncapa.org/ubuntu precise main'
+</pre>
+<p>
+You can display which repositories are currently enabled by using:
+</p>
+<pre>
+sudo apt-cache policy
+</pre>
 <h3>Install prerequisites</h3>
 <p> Execute: </p>
 <pre>
@@ -182,7 +191,7 @@ Once a choice has been entered for all n
 <li>Configure Apache web server</li>
 <li>Configure start-up of services</li>
 <li>Check firewall settings</li>
-<li>Stop services not used by LON-CAPA,<br />
+<li>Stop services not used by LON-CAPA,<br>
     e.g., services for a print server: cups daemon</li>
 <li>Download LON-CAPA source code in readiness for installation</li>
 </ul>
@@ -205,7 +214,7 @@ for it to function at all.  Below is a l
   <dd>Each site or school which installs LON-CAPA needs its own domain.
       Here at MSU we use 'msu'.  You should choose something short but
       meaningful.  <i>Restriction: One word, no hyphens, underscores, or 
-      special characters.</i><br />Domain names which include a departmental 
+      special characters.</i><br>Domain names which include a departmental 
       abbreviation are not recommended as although LON-CAPA may start in
       a single department, other departments frequently join subsequently.
       For a domain name: 'msu' is a superior choice to 'msuphys' for example.
@@ -281,7 +290,7 @@ Point a web browser at your new machine
 coordinator.  Congratulations!
 </p>
 
-<hr />
+<hr>
 <h2>If things aren't working right</h2>
 <p>
 If you've followed the steps above and the server doesn't start or you think