Make current directory DocumentRoot in apache

Create the following bash file and put it in the directory you want to use as apache root directory

#!/bin/sh
sed 's!\DocumentRoot .*!DocumentRoot '"`pwd`"'!' /etc/apache2/sites-available/default > default
sudo mv default  /etc/apache2/sites-available/
sudo /etc/init.d/apache2 restart

Configure apache to host domain and subdomain - ubuntu

1. Copy default configuration file

cd /etc/apache2/sites-available/
cp default mydomain.co.il [or mysubdomain.mydomain.co.il]

2. Disable default site

sudo a2dissite default
sudo /etc/init.d/apache2 reload
sudo rm /etc/apache2/sites-available/default

3. Edit mysubdomain.mydomain.co.il the to look like this:

<VirtualHost *:80>
ServerAdmin siteadmin@mydomain
ServerName mysubdomain.mydomain.co.il
DocumentRoot /var/www/mysubdomain/
<directory>
   Options Indexes FollowSymLinks MultiViews
   AllowOverride All
   Order allow,deny
   allow from all
</directory>

...
...
</VirtualHost>

4. Create link in site-enabled folder and reload apache configuration file

sudo a2ensite mysubdomain.mydomain.co.il
sudo /etc/init.d/apache2 reload

5. Repeat for every domain/subdomain.

Based on http://phobienbuon.com/archives/202
Tested on Ubuntu 10.4