In theory, making edits to the PhP is fairly straightforward:

<dl>
<dt>Become the www user on moog</dt>
<dd>To become the www user, ask Christopher for an
account on moog.  After he creates an account, use 
<code>ssh</code> to connect to <code>moog.eecs.berkeley.edu</code> and then do
<pre>
sudo -i
su - www
</pre>
The <code>sudo -i</code> command logs you in as root.
<br/>The <code>su - www</code> command makes you the
<code>www</code> user.</dd>

<dt>Make edits</dt>
<dd>The php files are in <code>~www/php/</code>
<br/>The website files are in <code>~www/<i>website</i>www</code>. 
<br/> To edit the php files, become the <code>www</code>
user and use <code>cvs commit</code> as the <code>www</code>
user.
<br/> To edit the website files, become the <code>cvs</code>
user and use <code>cvs commit</code> as the <code>cvs</code>
user.
</dd>
<dt>Look in <code>/export/home1/tmp/php.err</code> when there are problems.</dt>
<dd>This faq has other hints.  Also, try using
<code>cvs diff</code> to look at what changes have been made.</dd>
</ul>

<p>There are a number of complexities, some of which are documented in
<a href="http://embedded.eecs.berkeley.edu/dopsysadmin/faq/"><code>http://embedded.eecs.berkeley.edu/dopsysadmin/faq/</code></a>.</p>

<p>A good starting point is Web Infrastructure at
<a href="http://embedded.eecs.berkeley.edu/dopsysadmin/faq/43/">http://embedded.eecs.berkeley.edu/dopsysadmin/faq/43/</a></p>