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 <title>Configuration of a LON-CAPA Server</title>  <title>Configuration of a LON-CAPA Server</title>
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 <p>  <p>
 There are about a dozen files on the LON-CAPA server systems  There are about a dozen files on the LON-CAPA server systems
 which customize how each system interacts with the rest of the  which the system administrator may need to adjust.
 LON-CAPA network.  
 </p>  </p>
 <p>  <p>
 The two most important configuration files are:  The two most important configuration files are:
   </p>
 <ul>  <ul>
 <li><strong>loncapa.conf</strong> -  <li><strong>loncapa.conf</strong> -
 typically located in the directory <tt>/etc/httpd/conf/</tt>  typically located in the directory <tt>/etc/httpd/conf/</tt>;
 <br /><i>contains variables and modifications necessary for  <br /><i>contains machine-specific and institution-specific
 the effective running of the Apache web server</i>  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;  <br />&nbsp;
 </li>  </li>
 <li><strong>hosts.tab</strong> -  <li><strong>hosts.tab</strong> -
 typically located in the directory <tt>/home/httpd/lonTabs/</tt>  typically located in the directory <tt>/home/httpd/lonTabs/</tt>;
 <br /><i>is a listing of all other internet machines that a server  <br /><i>is a listing of all other internet machines that a server
 system considers to be valid server systems on the LON-CAPA  system considers to be valid server systems on the LON-CAPA
 network</i>  network</i>
 <br />&nbsp;  <br />&nbsp;
 </li>  </li>
 </ul>  </ul>
 </p>  
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 <h3>Configuration files and examples</h3>  <h3>Current Reconfiguration Procedure</h3>
 LON-CAPA currently depends on the following list of configuration  <p>
 files.  Locations of these files are by default.  Depending on your  After making any configuration change, you will need to restart system
 Linux distribution (RedHat, Mandrake, Debian, etc.), the file paths  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.  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>  <ul>
 <li><a href='confexamples/krb.conf'>[EXAMPLE]</a> /etc/krb.conf</li>  <li><a href="confexamples/loncapa.conf">[EXAMPLE]</a>
 <li><a href='confexamples/access.conf'>[EXAMPLE]</a>  
 /etc/httpd/conf/access.conf</li>  
 <li><a href='confexamples/loncapa.conf'>[EXAMPLE]</a>  
 /etc/httpd/conf/loncapa.conf</li>  /etc/httpd/conf/loncapa.conf</li>
 <li><a href='confexamples/hosts.tab'>[EXAMPLE]</a>  <li><a href="confexamples/hosts.tab">[EXAMPLE]</a>
 /home/httpd/lonTabs/hosts.tab</li>  /home/httpd/lonTabs/hosts.tab</li>
 <li><a href='confexamples/spare.tab'>[EXAMPLE]</a>  <li><a href="confexamples/spare.tab">[EXAMPLE]</a>
 /home/httpd/lonTabs/spare.tab</li>  /home/httpd/lonTabs/spare.tab</li>
 <li><a href='confexamples/htpasswd'>[EXAMPLE]</a>  <li><a href="confexamples/krb.conf">[EXAMPLE]</a> /etc/krb.conf</li>
   <li><a href="confexamples/htpasswd">[EXAMPLE]</a>
 /home/httpd/lonTabs/htpasswd</li>  /home/httpd/lonTabs/htpasswd</li>
 <li><a href='confexamples/smb.conf'>[EXAMPLE]</a> /etc/smb.conf</li>  <li><a href="confexamples/ntp.conf">[EXAMPLE]</a> /etc/ntp.conf</li>
 <li><a href='confexamples/ntp.conf'>[EXAMPLE]</a> /etc/ntp.conf</li>  <li><a href="confexamples/step-tickers">[EXAMPLE]</a>
 <li><a href='confexamples/un_keyword.tab'>[EXAMPLE]</a>  
 /home/httpd/html/res/adm/includes/un_keyword.tab</li>  
 <li><a href='confexamples/language.tab'>[EXAMPLE]</a>  
 /home/httpd/lonTabs/language.tab</li>  
 <li><a href='confexamples/step-tickers'>[EXAMPLE]</a>  
 /etc/ntp/step-tickers</li>  /etc/ntp/step-tickers</li>
 <li><a href='confexamples/pwauth'>[EXAMPLE]</a> /etc/pam.d/pwauth</li>  <li><a href="confexamples/pwauth">[EXAMPLE]</a> /etc/pam.d/pwauth</li>
 <li><a href='confexamples/config'>[EXAMPLE]</a> /etc/atalk/config</li>  
 </ul>  </ul>
 <h3>Current Reconfiguration Procedure</h3>  <h3>Configuration files that do not have to be altered</h3>
 <p>  <p>
 We recommend that you handle the reconfiguration manually.  The following configuration files are critical for the correct
 A knowledgeable system administrator should alter these configuration  performance of a LON-CAPA server machine.  Typically, these configuration
 files.  files do not need to be adjusted by the system administrator.
 </p>  </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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