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 <TITLE>LON-CAPA Installation</TITLE>  <!-- The LearningOnline Network with CAPA -->
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 <H1>LON-CAPA Installation</H1>  <head>
 <H3>Current Installation Procedure</H3>  <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta>
 <P>  <title>LON-CAPA Installation</title>
 Scott Harrison  <!-- pdfahref install.pdf -->
 </P>  <!-- button INSTALL -->
 <P>  </head>
 Last updated: 02/22/2001  <body bgcolor='#ffffff'>
 </P>  <!-- preamble start -->
 <P>  <br />&nbsp;
 This is the current list of steps to support LON-CAPA installation.  These steps have  <p>
 been tested.  You will need to check all the following things to ensure proper
 <OL>  installation of your LON-CAPA system.
 <LI>Get LON-CAPA on a CD by  </p>
 <UL>  <ul>
 <LI>Requesting a LON-CAPA installation CD (c/o Dr. Kortemeyer,   <li><a href="#wwwuser">
 korte@lon-capa.org).  Creating a user 'www'</a></li>
 <LI>Or, downloading a LON-CAPA installation <A HREF="http://install.lon-capa.org/3.1/currentcdimage">CD image</A> and burning a CD.  <li><a href="#shadow">
 <LI>(Depending on whether your computer has a bootable CD-ROM, you may  Make a LON-CAPA system work with shadow passwords</a></li>
 need to also make a boot floppy.  Download this floppy disk image file:   <li><a href="#install">
 <A HREF="http://install.lon-capa.org/3.1/currentcdsource/images/boot-20000407.img">  Installing LON-CAPA files</a></li>
 boot-20000407.img</A>.  (Download the image file; insert a blank floppy disk; and type this command: <TT>dd if=boot-20000407.img of=/dev/fd0</TT>).  <li><a href="#checkrpms">
 </UL>  Checking your Linux RPMs</a></li>
 <LI>Install with CD-ROM  <li><a href="#mysql">
 <UL>  Configuring the MySQL database</a></li>
 <LI>Follow the <A HREF="instructions_with_cd.html">  <li><a href="#testing">
 CD-ROM installation instructions</A>  Testing to see if the LON-CAPA server is operational</a></li>
 </UL>  </ul>
 <LI>After installation, restart the computer.  Login as root.  Enter this command (you only need to do this after your first reboot):  <br />&nbsp;
 <OL>  <!-- preamble end -->
 <LI><TT>sh /usr/sbin/loncapa_configure</TT>  <!-- maintext start -->
 </OL>  <a name="wwwuser" />
 </OL>  <h3>Creating a user 'www'</h3>
 </BODY>  <p>
 </HTML>  Execute the following command to create a user named 'www' on your
   LON-CAPA server:
   </p>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <tt>/usr/sbin/useradd www</tt>
   </td></tr></table>
   <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>
   <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 'WWWPASSWORD' with the value for 'lonSqlAccess'
   present inside <tt>/etc/httpd/conf/loncapa.conf</tt> <i>or in access.conf</i>
   </li>
   <li>you should substitute 'ROOTPASSWORD' with something very hard to guess
   (it does not have to be the Linux OS root password)
   </li>
   </ul>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <caption>Entering the mysql shell</caption>
   <pre>
   mysql -u root -p mysql
   OR
   mysql -u root      (depending on whether you have set a root password)
   </pre>
   </td></tr></table>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <caption>Creating the mysql 'www' user (after entering mysql shell)</caption>
   <pre>
   mysql> CREATE DATABASE loncapa;
   
   mysql> INSERT INTO user (Host, User, Password)
   mysql> VALUES ('localhost','www',password('WWWPASSWORD'));
   
   mysql> GRANT ALL PRIVILEGES ON *.* TO www@localhost;
   
   mysql> FLUSH PRIVILEGES;
   </pre>
   </td></tr></table>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <caption>SECURITY: set a password for the mysql 'root' user</caption>
   <pre>
   shell> mysql -u root mysql
   mysql> SET PASSWORD FOR root@localhost=PASSWORD('ROOTPASSWORD');
   </pre>
   </td></tr></table>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <caption>SECURITY: set a password for the mysql 'root' user</caption>
   <pre>
   shell> mysql -u root mysql
   mysql> SET PASSWORD FOR root@localhost=PASSWORD('ROOTPASSWORD');
   </pre>
   </td></tr></table>
   <table bgcolor="#aaaaaa" border="1"><tr><td>
   <caption>SECURITY: only allow access from localhost</caption>
   <pre>
   shell> mysql -u root -p mysql
   mysql> DELETE * FROM user WHERE host<>'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>
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