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Red Hat Enterprise Linux 4 Install
Installing LON-CAPA on a minimal Red Hat Enterpise Linux 4 ES System
This document guides you through the process of setting up a new LON-CAPA server running Red Hat Enterpise Linux 4 (ES) with a minimum of packages installed. The computer will be configured solely as a LON-CAPA server and will be expected to have no other services running. Your server is expected to have a reasonably fast connection to the internet.
More information is available at http://install.lon-capa.org/.
Before you begin
Installing Linux is getting easier and easier. However, it is still a non-trivial undertaking and experience with Red Hat Linux will make this process easier. You will be required to log in to the machine and execute some routine Unix commands. Familiarity with the Apache web server, mod_perl, perl, and MySQL are not required to install and run LON-CAPA.
The installation process takes the following steps:
Obtain Red Hat Enterprise Server CDs
RHEL4 ES CDs can be purchased from Red Hat: http://redhat.com/. For the minimal install on 32-bit architecture you will need only the first two CDs.
Determine Network Settings
You will need to know the following network settings for your installation. Note:You must have a static IP address to use LON-CAPA. DHCP is not supported.
Minimal Red Hat Enterprise Linux 4 Install
Installing Red Hat Enterprise Linux is quite easy if you've installed any of the Red Hat products before. Documentation is available from http://www.redhat.com/docs/manuals/enterprise/ Specific comment is provided for some of the installation steps below.
Finish installing your server, reboot it, and log in as root.
Update your system
Import the GPG key for use in verifying packages retrieved from the Red Hat Network.
rpm --import /usr/share/rhn/RPM-GPG-KEYNext you will need to register your server with the Red Hat Network.
Information about registration for the Red Hat Network can be found at: http://www.redhat.com/software/rhn/. You can register directly from the server where you will be installing LON-CAPA using:
up2date --registerOnce you have registered your system so it has access to Red Hat package updates, you should first check the up2date configuration, and make any necessary changes (e.g., disable skipping of kernel updates).
up2date-configNext update your system to the latest versions of the system software using up2date.
Reboot your system before continuing with the installation.
Retrieve the RHEL4_loncapa_rhnsources file from the LON-CAPA install site:
Install the RHEL4_loncapa_rhnsources
mv /etc/sysconfig/rhn/sources /etc/sysconfig/rhn/sources.backup cp RHEL4_loncapa_rhnsources /etc/sysconfig/rhn/sources up2date
Import the GPG key for use in verifying LON-CAPA packages retrieved from the LON-CAPA installation site.
rpm --import http://install.loncapa.org/versions/redhat/RPM-GPG-KEY-loncapa
Execute the installation
up2date LONCAPA-prerequisitesThis may take some minutes due to LON-CAPA's large number of dependencies.
Retrieve and execute LON-CAPA setup program
Retrieve the LON-CAPA setup with the following command:
Extract the archive with the following command:
tar xf install.tar
This creates a directory named installation. Change to it and execute the setup script with the following commands:
cd installation ./install.pl
The script is used to prepare a Linux system to run LON-CAPA, and can also be used to check the configuration of a system on which LON-CAPA has already been installed. Typically, though, you will run this script only once, when you first install LON-CAPA.
The script will analyze your system to determine which actions are recommended. The script will then prompt you to choose the actions you would like taken. Once a choice has been entered for all nine possible actions, required changes will be made.
The possible actions are:
Determine LON-CAPA Settings
LON-CAPA requires a number of identifying parameters to be set in order for it to function at all. Below is a list with descriptions.
To configure and install LON-CAPA, execute the following commands:
cd /root/loncapa-X.Y.Z (X.Y.Z should correspond to a version number like '2.10.0') ./UPDATE
You will need to enter the LON-CAPA configuration information you determined in the previous section.
Creating a Domain Coordinator
You will need at least one user at your site who has the role of 'domain coordinator'. This user creates accounts for other users and grants them additional privileges. The make_domain_coordinator.pl script invoked below requires that you enter the user's password. Feel free to use the "passwd username" command to change it later. Replace USERNAME and DOMAIN with an appropriate user name and your domain.
cd /root/loncapa-X.Y.Z/loncom/build perl make_domain_coordinator.pl USERNAME DOMAIN
The LON-CAPA network services take a moment to start. Most misconfigurations will be apparent at this step.
/etc/init.d/loncontrol start /etc/init.d/httpd start
If you receive warnings when starting the httpd about missing perl modules, please make sure you followed the instructions in Installing LON-CAPA Dependencies. If you still have errors, please contact the LON-CAPA development team.
Log in to your LON-CAPA Machine
Point a web browser at your new machine and log in as the domain coordinator. Congratulations!
If things aren't working right
If you've followed the steps above and the server doesn't start or you think
there's something wrong, please get in touch with the LON-CAPA group.
You can submit a help request using our web form:
Contact Us: firstname.lastname@example.org
Supported by the National Science Foundation under NSF-ITR 0085921, NSF-CCLI-ASA 0243126, and NSF-CCLI 0717790. Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Initial funding for CAPA has been provided by the Alfred. P. Sloan Foundation and the Andrew W. Mellon Foundation.
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