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 <HEAD>  
 <TITLE>LON-CAPA Reconfiguration</TITLE>  
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 <H1>LON-CAPA Reconfiguration</H1>  
 <H3>Current Reconfiguration Procedure</H3>  
 <P>  
 Currently, reconfiguration must be handled manually and involves an administrator  
 altering configuration files present throughout the system.  For a list of these  
 files and their descriptions, visit <A HREF="http://www.lon-capa.org/install/3.1/loncapafiles.html">  
 http://www.lon-capa.org/install/3.1/loncapafiles.html</A>.  
 </P>  
 <H3>Future Reconfiguration Procedure (not yet implemented)</H3>  
 <P>  
 In the future, LON-CAPA Reconfiguration will be handled by a GUI tool (and text-based UI)  
 developed as an offshoot from the RedHat anaconda python-Tk system.  This tool is  
 already working in many respects, but awaits completion.  
 </P>  
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 </HTML>  
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
   <!-- $Id$ -->
   <html>
   <head>
   <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta>
   <title>Configuration of a LON-CAPA Server</title>
   <!-- pdfahref index.pdf -->
   <!-- button CONFIGURE -->
   </head>
   <body bgcolor="#ffffff">
   <!-- preamble start -->
   <p>
   There are about a dozen files on the LON-CAPA server systems
   which the system administrator may need to adjust.
   </p>
   <p>
   The two most important configuration files are:
   </p>
   <ul>
   <li><strong>loncapa.conf</strong> -
   typically located in the directory <tt>/etc/httpd/conf/</tt>;
   <br /><i>contains machine-specific and institution-specific
   variables and modifications necessary for
   the effective running of the Apache web server;
   note that there is also a <strong>loncapa_apache.conf</strong>
   which should be installed, but not modified</i>
   <br />&nbsp;
   </li>
   <li><strong>hosts.tab</strong> -
   typically located in the directory <tt>/home/httpd/lonTabs/</tt>;
   <br /><i>is a listing of all other internet machines that a server
   system considers to be valid server systems on the LON-CAPA
   network</i>
   <br />&nbsp;
   </li>
   </ul>
   <!-- preamble end -->
   <!-- maintext start -->
   <h3>Current Reconfiguration Procedure</h3>
   <p>
   After making any configuration change, you will need to restart system
   services.  The two most important system services on a LON-CAPA system are
   <strong>loncapa</strong> and <strong>httpd</strong>.  Here are the
   commands for restarting the system services:
   </p>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <tt>/etc/rc.d/init.d/loncapa restart</tt>
   <br /><tt>/etc/rc.d/init.d/httpd restart</tt>
   </td></tr></table>
   <p>
   We recommend that a knowledgeable system administrator should
   perform any adjustments on a LON-CAPA server machine.
   Locations of these files are by default.  Depending on your
   Linux distribution--RedHat, Mandrake, Debian, etc, the file paths
   may be elsewhere.
   </p>
   <h3>Configuration files that will have to be altered</h3>
   <p>
   LON-CAPA currently depends on the following list of configuration
   files.  Note that <tt>loncapa.conf</tt> is automatically
   altered by the installation/upgrade scripts associated with
   the tarball-distribution (see the <b>INSTALL</b> and <b>UPGRADE</b>
   sections of this web-site).  (Thus, the system administrator should
   not have to further adjust <tt>loncapa.conf</tt> from the terminal.)
   </p>
   <ul>
   <li><a href="confexamples/loncapa.conf">[EXAMPLE]</a>
   /etc/httpd/conf/loncapa.conf</li>
   <li><a href="confexamples/hosts.tab">[EXAMPLE]</a>
   /home/httpd/lonTabs/hosts.tab</li>
   <li><a href="confexamples/spare.tab">[EXAMPLE]</a>
   /home/httpd/lonTabs/spare.tab</li>
   <li><a href="confexamples/krb.conf">[EXAMPLE]</a> /etc/krb.conf</li>
   <li><a href="confexamples/htpasswd">[EXAMPLE]</a>
   /home/httpd/lonTabs/htpasswd</li>
   <li><a href="confexamples/ntp.conf">[EXAMPLE]</a> /etc/ntp.conf</li>
   <li><a href="confexamples/step-tickers">[EXAMPLE]</a>
   /etc/ntp/step-tickers</li>
   <li><a href="confexamples/pwauth">[EXAMPLE]</a> /etc/pam.d/pwauth</li>
   </ul>
   <h3>Configuration files that do not have to be altered</h3>
   <p>
   The following configuration files are critical for the correct
   performance of a LON-CAPA server machine.  Typically, these configuration
   files do not need to be adjusted by the system administrator.
   </p>
   <ul>
   <li><a href="confexamples/loncapa_apache.conf">[EXAMPLE]</a>
   /etc/httpd/conf/loncapa_apache.conf</li>
   <li><a href="confexamples/un_keyword.tab">[EXAMPLE]</a>
   /home/httpd/html/res/adm/includes/un_keyword.tab</li>
   </ul>
   
   <h3>Configuring Secondary Services</h3>
   <p>
   LON-CAPA does not provide integrated support for secondary services.
   The expectation is that knowledgeable system administrators will
   customize these secondary services for their institution.
   </p>
   <p>
   We do, however, provide example configurations of services that you
   may want to deliver with LON-CAPA (i.e. Samba and AppleChooser).
   </p>
   <ul>
   <li><a href="confexamples/smb.conf">[EXAMPLE]</a> /etc/smb.conf</li>
   <li><a href="confexamples/config">[EXAMPLE]</a> /etc/atalk/config</li>
   </ul>
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