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INSTALLING LON-CAPA ON A REDHAT 7.2 SYSTEM	INSTALLING LON-CAPA ON A REDHAT 7.2/7.3 SYSTEM

Scott Harrison	Scott Harrison

Line 14 Scott Harrison	Line 14 Scott Harrison
Quick Instructions	Quick Instructions
------------------	------------------

PLEASE contact harris41@msu.edu if these instructions	PLEASE contact sharrison@users.sourceforge.net if these instructions
do not work.	do not work.
PLEASE subscribe yourself to the ANNOUNCE MAILING LIST!	PLEASE subscribe yourself to the ANNOUNCE MAILING LIST!
Go to http://mail.lon-capa.org/mailman/listinfo/lon-capa-announce	Go to http://mail.lon-capa.org/mailman/listinfo/lon-capa-announce

1. Download http://install.lon-capa.org/versions/current/loncapa.tar.gz	1. Download the current version of LON-CAPA from
(from a linux terminal, type	http://install.lon-capa.org/downloads/
wget http://install.lon-capa.org/versions/current/loncapa.tar.gz)	2. tar xzvf loncapa-N.N.tar.gz (where N.N is the current version number)
2. tar xzvf loncapa.tar.gz
3. cd loncapa	3. cd loncapa
4. Read the README file (this file).	4. Read the README file (this file).
5. EXECUTE: ./UPDATE	5. EXECUTE: ./UPDATE
Line 47 Your interest, questions and suggestions	Line 46 Your interest, questions and suggestions
invited for the specific development of the GPL code.	invited for the specific development of the GPL code.

We do our best to help get you started with a 100% operational	We do our best to help get you started with a 100% operational
system. Please e-mail harris41@msu.edu or helen@lon-capa.org	system. Please e-mail sharrison@users.sourceforge.net or
for help with software installation.	helen@lon-capa.org for help with software installation.

Hardware Recommendation	Hardware Recommendation
-----------------------	-----------------------
Line 69 before a homework submission deadline.	Line 68 before a homework submission deadline.
peaks of activity, it is strongly advised that LON-CAPA machines	peaks of activity, it is strongly advised that LON-CAPA machines
fit the above recommendation.	fit the above recommendation.

If thousands of students start accessing the box as a web server...	If thousands of students start accessing the box as a web server,
well you may want to consider more options. The design of the LON-CAPA	then you may want to consider more options. The design of the LON-CAPA
system is to naturally and transparently load-balance on multiple	system is to naturally and transparently load-balance on multiple
computer clusters. So, a simple solution for running an entire	computer clusters. So, a simple solution for running an entire
college campus is to just have an adequate plurality of LON-CAPA	college campus is to just have an adequate plurality of LON-CAPA
servers rather than a single, particularly monstrous server.	servers rather than a single, particularly monstrous server.

We like to think of high web server usage as "a good problem" though.. :)	We like to think of high web server usage as "a good problem" though.... :)

More Information on Hardware and System Administration	More Information on Hardware and System Administration
------------------------------------------------------	------------------------------------------------------
Line 103 installs. Given the current level of ne	Line 102 installs. Given the current level of ne
and frequency of new software versions, we suggest that you stick	and frequency of new software versions, we suggest that you stick
with RedHat to reduce high-frequency system administration overhead.	with RedHat to reduce high-frequency system administration overhead.

Strategy	Critical system software: a "strategic" outlook
--------	---------------------------------------------

	In this section, issues related to LON-CAPA server software
	are discussed. (The section after this section describes how to test
	and fix problems associated with the issues described below.)

	In general, you should expect that LON-CAPA "completely overtakes"
	a Linux server system. Using the same LON-CAPA server computer to disseminate
	other unrelated services to your institution is not recommended.

* PERL *	* PERL *
It is important to check and see if your system has all	A LON-CAPA system needs to have all the
needed perl modules in /usr/lib/perl5/.	necessary perl modules inside /usr/lib/perl5/.

* RPMS *	* RPMs *
It is important to:	RPMs are the software packages on a RedHat linux system (the standard,
* keep your RPMs up to date	supported operating system for LON-CAPA). For security reasons, you need
* try to have a reasonably minimal set	to keep your RPMs up to date. For security and performance reasons, a
	knowledgeable system administrator at your institution should try to have
	a reasonably minimal set; e.g. a LON-CAPA server probably does not need the
	"pine" RPM (an e-mail client).

* MYSQL *	* MYSQL *
It should be kept operational at all times.	The MySQL database facilitates fast transactions by passing information on
In case of failure, there is a resynchronizing	the LON-CAPA server to the world-wide web. Important point: in order to
strategy so that the data on the filesystem	prevent problems associated with 1) corrupted database files,
continually refreshes the data within the	2) database crashes, 3) changing versions of MySQL, and 4) information export
MYSQL database.	and import, the information in the MySQL database IS NOT AUTHORITATIVE.
	In other words, if the MySQL database gets wiped out, YOU HAVE NOT LOST
	CRITICAL DATA. The authoritative data exists on the filesystem and
	the MySQL database is dynamically repopulated and refreshed by
	/home/httpd/perl/searchcat.pl.

* APACHE *	* APACHE *
LON-CAPA expects that conf/loncapa.conf will be the	LON-CAPA expects that conf/loncapa_apache.conf will be the last Apache
last Apache configuration file to be processed before	configuration file to be processed before launching the httpd server. This
launching the httpd server. This may interfere	may interfere with other ways in which you utilize your web server. For
with other ways in which you utilize your web server.	instance, LON-CAPA requires that httpd run as user=www and group=www.
For instance, LON-CAPA requires that httpd
run as user=www and group=www.

Testing	Testing
-------	-------

	The ./TEST command automates five different kinds of tests.

1. Perl	1. Perl

2. MySQL	2. MySQL

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