codeIgniter インストール

$wget http://ellislab.com/codeigniter/download
$unzip CodeIgniter_2.1.3.zip

$mv CodeIgniter_2.1.3 webapp

$cd webapp
$mkdir htdocs

apacheのDocumentRootをhtdocsにする

#systemとapplicationのパスを変更
vi index.php
$ diff index.php index.php.org
59c59
<       $system_path = '../system';
---
>       $system_path = 'system';
75c75
<       $application_folder = '../application';
---
>       $application_folder = 'application';

httpd.confの設定
<IfModule rewrite_module>
    RewriteEngine On
    RewriteCond $1 !^/(index\.php|images/js/css/robot\.txt|favicon\.ico)
    RewriteRule ^(.*)$ /index.php$1 [R,L]
</IfModule>