How to make Linux Debian based as Web Server

If you want to make your linux debian based as Web server, bellow is the way

Installing Apache 

apt-get install apache2

After that , do test HTTP Server:
Open a web browser and enter http://localhost or its IP Address http://ip-address.

Installing PHP

apt-get install php4
/etc/init.d/apache2 restart
vi /var/www/testphp.php

To test it, Insert this following line into testphp.php file.

<?php phpinfo(); ?>

Save this new file.
Open a web browser and enter http://IP-Address/testphp.php .

Install PostgreSQL

apt-get install libapache2-mod-auth-pgsql
apt-get install php4-pgsql
/etc/init.d/apache2 restart

Mapping URLs to folders outside /var/www/

vi /etc/apache2/conf.d/alias

Insert this following line into the new file.

Alias /URL-path /location_of_folder/

<directory /location_of_folder/>
   Options Indexes FollowSymLinks
   AllowOverride All
   Order allow,deny
   Allow from all
</Directory>

Save a new file.

Restart Apache

/etc/init.d/apache2 restart

finished :)