The new Apache default server location is /var/www/html. You can move all your files to the new directory or you can do the following on a terminal (as root):
# cd /etc/apache2/sites-available
# nano site1
Now, on nano paste the following:
<VirtualHost *:80>
ServerAdmin webmaster@localhost
ServerName site1
DocumentRoot /var/www/
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>
ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
<Directory "/usr/lib/cgi-bin">
AllowOverride None
Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
Order allow,deny
Allow from all
</Directory>
ErrorLog /var/log/apache2/error.log
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel warn
CustomLog /var/log/apache2/access.log combined
Alias /doc/ "/usr/share/doc/"
<Directory "/usr/share/doc/">
Options Indexes MultiViews FollowSymLinks
AllowOverride None
Order deny,allow
Deny from all
Allow from 127.0.0.0/255.0.0.0 ::1/128
</Directory>
</VirtualHost>
Save the file and run these commands (again as root):
# a2ensite site
# nano /etc/hosts
Now add this on the first line: 127.0.0.1 localhost site1
Save the file and reload Apache with this command (again as root):
# /etc/init.d/apache2 reload
You should get a message telling you site1 is enabled. Now you can safely remove /var/www/html so you don't have an empty directory on your server:
# rm /var/www/html/
Hope it helps, greetings.