Apache

Enable site:sudo a2ensite SITENAME
Disable site:sudo a2dissite SITENAME
List apache modules:apache2ctl -M
Enable an apache2 module:sudo a2enmod MODULENAME
Disable an apache2 module:sudo a2dismod MODULENAME
Enable mod rewrite: sudo a2enmod rewrite
Reload server:service apache2 reload
Force reload the server:sudo /etc/init.d/apache2 force-reload
Apache file permissions:
chown -R www-data:www-data /folder/
chmod +r /folder
Virtual hosts directory: /etc/apache2/sites-available/
Virtual Host sample file:
<VirtualHost *:80>
DocumentRoot /var/www/site
ServerName site.example.com
CustomLog /var/www/logs/site/access.log combined
ErrorLog /var/www/logs/site/error.log
</VirtualHost>