--- doc/build/ubuntu10LTS_install.frag	2011/06/08 22:28:05	1.3
+++ doc/build/ubuntu10LTS_install.frag	2011/06/09 00:07:55	1.4
@@ -99,10 +99,11 @@ sudo allow ssh
 sudo allow www
 sudo allow https
 </pre>
-   <dt>E-mail Configuration</dt>
-   <dd>By default Ubuntu disallows mailing to remote domains. Change using<dd>
+   <dt>E-mail: Postfix Installation and Configuration</dt>
+   <dd>By default postfix disallows mailing to remote domains. Change this to "Internet Site" to allow LON-CAPA to send e-mail to users. Commands:<dd>
 <pre>
-sudo dpkg-reconfigure exim4-config
+sudo apt-get install postfix
+sudo dpkg-reconfigure postfix
 </pre
 </p>
 
@@ -118,20 +119,12 @@ sudo apt-get upgrade
 If kernel packages were updated, reboot your system before continuing with the installation.
 </p>
 <p>
-Retrieve the ubuntu10_LTS_sources.list file from the LON-CAPA install site:
+Add LON-CAPA ubuntu repository to your /etc/apt/sources.list file. 
 </p>
 <pre>
-wget http://install.loncapa.org/versions/ubuntu/10.04/ubuntu10_LTS_sources.list
+sudo apt-get install python-software-properties
+sudo apt-add-repository 'deb http://install.loncapa.org/ubuntu lucid main
 </pre>
-<p>
-Install ubuntu10_LTS_sources.list
-</p>
-<p>
-<pre>
-mv /etc/apt/sources.list /etc/apt/sources.list.backup
-cp ubuntu10_LTS_sources.list /etc/apt/sources.list
-</pre>
-</p>
 <h2>5. <a name="ilc">Installing LON-CAPA</a></h2>
 <h3>Import the LON-CAPA encryption key</h3>
 <pre>