Configurations

Configuring Apache for multiple virtual hosts

• How To Set Up Apache Virtual Hosts on Ubuntu 12.04 LTS - digitalocean.com
  

Configuring WordPress for use of multiple domains

• Create A Network - wordpress.org
  
• How To Set Up Multiple WordPress Sites Using Multisite - digitalocean.com
  

Configuring SSL

• How To Set Up Apache with a Free Signed SSL Certificate on a VPS - digitalocean.com
  
• Using Multiple SSL Certificates in Apache with One IP Address - digicert.com
  

Configuring redirect on webserver

• Redirect IP address to domain name - stackoverflow
  
• Using .htaccess rewrite rules - mediatemple.net
  

Configuring Mediawiki

• Making MediaWiki secure (and fixing some config annoyances) - t-machine.org
  
• Extension:Email notification - mediawiki.org
  

Configuring WordPress

• Checking if PHP/WordPress can send mails - rtcamp.com
  
• Brute Force Attacks - wordpress.org
  
• Hardening WordPress - wordpress.org
  
• All In One WP Security & Firewall - wordpress.org