This article tells how to add virtual hosts on your apache server.
Generally, there are only three easy steps.
On Linux systems, take Ubuntu for example
1. Go to '/etc/apache2/sites-available/', open 'default' file, add the following lines at the bottom:
<VirtualHost *>
ServerName www.otherdomain.tld
DocumentRoot /www/otherdomain
</VirtualHost>
Then close the file.
2. Restart apache:
sudo /etc/init.d/apache2 restart
3. Open '/etc/hosts', add the following line at the top:
127.0.0.1 www.otherdomain.tld
Close the file. Open your browser, type
www.otherdomain.tld
You'll see it.