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Apache

Welcome to the world wide web!

Configuration Files

  • /etc/apache2/httpd.conf - Main apache configuration. Includes module configurations using Include directive.
  • /etc/apache2/modules.d/*.conf - Modules configuration files
  • /etc/apache2/vhosts.d/*.conf - VirtualHosts configuration files

Howtos

Redirect site to HTTPS
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
Redirect all non-domain names to the domain
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www.domain.com
RewriteRule (.*) http://www.domain.com$1 [R=301,L]
Redirect non-www prefix for a domain to www
RewriteCond %{HTTP_HOST} ^example.com
RewriteRule (.*) http://www.example.com/$1 [R=301,L]
Rewrite if REQUEST_URI matches string

You can use Perl regular expression syntax with RewriteCond 

RewriteEngine On
RewriteCond %{REQUEST_URI} ^/(dmc)?wiki
RewriteRule ^(.*)$ https://wiki.digitaltrike.com/$1
Allow access from subnet only
Order Deny,Allow
Deny from all
Allow from 192.168.1.0/24
List modules

CentOS: 

apachectl -t -D DUMP_MODULES
Disable any caching on 192.168.12. subnet
SetEnvIf Remote_Addr 192\.168\.12\. local
<IfModule mod_headers.c>
Header set Pragma "" env=local
Header set Cache-Control "" env=local
Header set Expires "Sat, 01 Jan 2000 00:00:00 GMT" env=local
</IfModule>
Enable PHP overrides in .htaccess

If PHP is installed as a CGI binary, this will not work. But it is safe to set because of IfModule. 

<IfModule mod_php5.c>
php_value include_path ".:/usr/local/lib/php"
</IfModule>