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 <title>LON-CAPA Installation</title>  <title>LON-CAPA Installation</title>
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 <h1>LON-CAPA Installation</h1>  <!-- preamble start -->
 <h3>Current Installation Procedure</h3>  <br />&nbsp;
 <p>  <p>
 Scott Harrison  You will need to check all the following things to ensure proper
 </p>  installation of your LON-CAPA system.
 <p>$Date$; $Revision$</p>  </p>
 <p>  
 This is the current list of steps to support LON-CAPA installation.  These  
 steps have been tested.</p>  
 <ol>  
 <li>Get LON-CAPA on a CD by  
 <ul>  <ul>
 <li>Requesting a LON-CAPA installation CD (c/o Helen Keefe,   <li><a href="#wwwuser">
 helen@lon-capa.org).</li>  Creating a user 'www'</a></li>
 <li>Or, downloading a LON-CAPA installation  <li><a href="#shadow">
 <a href="http://install.lon-capa.org/3.1/currentcdimage">CD image</A> and  Make a LON-CAPA system work with shadow passwords</a></li>
 burning a CD.</li>  <li><a href="#install">
 <li>(Depending on whether your computer has a bootable CD-ROM, you may  Installing LON-CAPA files</a></li>
 need to also make a boot floppy.  Download this floppy disk image file:   <li><a href="#checkrpms">
 <a href=  Checking your Linux RPMs</a></li>
 "http://install.lon-capa.org/3.1/currentcdsource/images/boot-20000407.img">  <li><a href="#mysql">
 boot-20000407.img</a>.  (Download the image file; insert a blank floppy disk;  Configuring the MySQL database</a></li>
 and type this command: <tt>dd if=boot-20000407.img of=/dev/fd0</tt>).</li>  <li><a href="#testing">
 </ul></li>  Testing to see if the LON-CAPA server is operational</a></li>
 <li>Install with CD-ROM  </ul>
   <p>
   <strong>NOTE:</strong>
   If you want to simultaneously install both RedHat 7.3 and LON-CAPA
   (to ensure 100% reliability), follow <a href="rh73.html">these
   alternative directions</a>.
   </p>
 <ul>  <ul>
 <li>Follow the <A HREF="instructions_with_cd.html">  <li><a href="#wwwuser">
 CD-ROM installation instructions</a></li>  Creating a user 'www'</a></li>
 </ul></li>  <br />&nbsp;
 <li>After installation, restart the computer.  Login as root.  Enter this  <!-- preamble end -->
 command (you only need to do this after your first reboot):  <!-- maintext start -->
 <ol>  <a name="wwwuser" />
 <li><tt>sh /usr/sbin/loncapa_configure</tt></li>  <h3>Creating a user 'www'</h3>
 </ol></li>  <p>
 </ol>  Execute the following command to create a user named 'www' on your
 <hr />  LON-CAPA server:
 <p>  </p>
 You can also try to install LON-CAPA on an existing installation of  <table bgcolor="#aaaaaa" border="1"><tr><td>
 RedHat 6.2.  Please see <a  <tt>/usr/sbin/useradd www</tt>
 href='how_to_install_loncapa_on_a_preinstalled_system.txt'>  </td></tr></table>
 how_to_install_loncapa_on_a_preinstalled_system.txt</a>.  <a name="shadow" />
   <h3>Make a LON-CAPA system work with shadow passwords</h3>
   <table border="1">
   <tr><th>Step #</th><th>Description</th></tr>
   <tr><td>
   <font size="+1">1</font>
   </td><td>
   <p>Is your system using shadow passwords? (Note: LON-CAPA will
   work with either MD5/non-MD5 configured systems).  If your
   system is not using shadow passwords, then do not perform
   any of the additional steps.  If your system is using shadow
   passwords, then you will need to perform the additional steps below.
   </p>
   <p>
   <strong>How to detect:</strong>
   <br />command: <tt>cat /etc/passwd | grep ':x:'</tt>
   </p>
   <p>If there is output such as "<tt>root:x:0:0:root:/root:/bin/bash</tt>",
   then your system is using shadow passwords and you will need to continue with
   the steps below.
   </p>
   </td></tr>
   <tr><td>
   <font size='+1'>2</font>
   </td><td>
   <p><strong>Retrieve the mod_auth_external source</strong> by
   running the following command
   </p>
   <p><tt>
   wget http://www.wwnet.net/~janc/software/mod_auth_external-2.1.13.tar.gz
   </tt>
   </p>
   </td></tr>
   <tr><td>
   <font size='+1'>3</font>
   </td><td>
   <p><strong>Unpack the mod_auth_external source</strong> by
   running the following command
   </p>
   <p>
   <tt>tar xzvf mod_auth_external-2.1.13.tar.gz</tt>
   </p>
   </td></tr>
   <tr><td>
   <font size='+1'>4</font>
   </td><td>
   <p><strong>Go to the <tt>pwauth</tt> directory</strong> by
   running the following command
   </p>
   <p>
   <tt>cd mod_auth_external-2.1.13/pwauth/</tt>
   </p>
   </td></tr>
   <tr><td>
   <font size='+1'>5</font>
   </td><td>
   <p><strong>Edit <tt>config.h</tt> and change SERVER_UIDS definition</strong>
   </p>
   <p>
   Determine the user id of 'www':
   <br /><tt>grep ^www /etc/passwd | cut -d':' -f3</tt>
   <br />
   Change the line
   <br /><tt>#define SERVER_UIDS 99       /* user "nobody" */</tt>
   <br />to be
   <br /><tt>#define SERVER_UIDS 513      /* user "www" */</tt>
   <br />where in this example 513 corresponds to the user id of 'www'.
   </p>
   </td></tr>
   <tr><td>
   <font size='+1'>6</font>
   </td><td>
   <p><strong>Compile the <tt>pwauth</tt> executable</strong> by
   running the following command
   </p>
   <p>
   <tt>make</tt>
   </p>
   </td></tr>
   <tr><td>
   <font size='+1'>7</font>
   </td><td>
   <p><strong>Install <tt>pwauth</tt></strong> by doing the following
   </p>
   <p>
   <tt>cp pwauth /usr/local/sbin/</tt>
   <br /><tt>chmod 6755 /usr/local/sbin/pwauth</tt>
   </p>
   <p>
   Edit (creating the file) /etc/pam.d/pwauth to have the contents:
   </p>
   <pre>
           auth       required     /lib/security/pam_pwdb.so shadow nullok
           auth       required     /lib/security/pam_nologin.so
           account    required     /lib/security/pam_pwdb.so
   </pre>
   </td></tr>
   </table>
   <a name="install" />
   <h3>Installing LON-CAPA files</h3>
   <p>
   Download the most current
   <a href="http://install.lon-capa.org/versions/current/loncapa.tar.gz">
   loncapa.tar.gz</a>.
   </p>
   <table bgcolor="#aaaaaa" border="1">
   <tr><td><tt>wget http://install.lon-capa.org/versions/current/loncapa.tar.gz
   </tt>
   <br />
   <tt>tar xzvf loncapa.tar.gz</tt>
   <br />
   <tt>cd loncapa</tt></td></tr>
   </table>
   <p>
   The <strong>UPDATE</strong> command will refresh your filesystem with all
   the latest LON-CAPA software.
   </p>
   <table bgcolor="#aaaaaa" border="1">
   <tr><td><tt>./UPDATE</tt></td></tr>
   </table>
   <a name="checkrpms" />
   <h3>Checking your Linux RPMs</h3>
   <p>
   The <strong>CHECKRPMS</strong> command will check the RPMs on your machine
   against an FTP repository.
   </p>
   <table bgcolor="#aaaaaa" border="1">
   <tr><td><tt>./CHECKRPMS</tt></td></tr>
   </table>
   <a name="mysql" />
   <h3>Configuring the MySQL database</h3>
   <p>
   The following commands describe how to configure the MySQL database
   on your LON-CAPA server.
   <br />Note:
   </p>
   <ul>
   <li>you should substitute 'ROOTPASSWORD' with something very hard to guess
   (it does not have to be the Linux OS root password)
   </li>
   <li>The MySQL www@localhost user must always have a password of 'localhostkey'
   in order for there to be correct operation of a standard LON-CAPA system.
   </li>
   </ul>
   <p>
   The following instructions assume you are logged in as 'root'.
   </p>
   <p>Entering the mysql shell</p>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <pre>
   mysql -u root -p mysql
   OR
   mysql -u root mysql (depending on whether you have set a root password)
   </pre>
   </td></tr></table>
   <p>Creating the mysql 'www' user (after entering mysql shell)</p>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <pre>
   mysql> CREATE DATABASE loncapa;
   
   mysql> INSERT INTO user (Host, User, Password)
   mysql> VALUES ('localhost','www',password('localhostkey'));
   
   mysql> GRANT ALL PRIVILEGES ON *.* TO www@localhost;
   
   mysql> FLUSH PRIVILEGES;
   </pre>
   </td></tr></table>
   <p>SECURITY: set a password for the mysql 'root' user</p>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <pre>
   shell> mysql -u root mysql
   mysql> SET PASSWORD FOR root@localhost=PASSWORD('ROOTPASSWORD');
   </pre>
   </td></tr></table>
   <p>SECURITY: only allow access from localhost</p>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <pre>
   shell> mysql -u root -p mysql
   mysql> DELETE FROM user WHERE host&lt;&gt;'localhost';
   </pre>
   </td></tr></table>
   <a name="testing" />
   <h3>Testing to see if the LON-CAPA server is operational</h3>
   <p>
   The <strong>TEST</strong> command will check the installation software,
   the perl libraries on your system, the MySQL database, and
   will also automatically test the real-time operation of the 
   LON-CAPA Apache web server.
   </p>
   <table bgcolor="#aaaaaa" border="1">
   <tr><td><tt>./TEST</tt></td></tr>
   </table>
   <p>
   Using the <strong>TEST</strong> command will likely
   be an iterative process.
   It is normal to expect that the <strong>TEST</strong> command
   will recommend you perform various steps to ensure optimal
   performance of your LON-CAPA server.
 </p>  </p>
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