Installation of Postgressql server and Chill database

source/installation/install_postgres_server.rst

@@ -11,16 +11,64 @@
 Install PostgresSql server
 ##########################
 
-.. todo::
+On a linux environment, installing Postgresql server is very easy.
+Here follows the instructions for a debian based distribution (as Ubuntu).
 
-   the section "Install PostresSql database" must be written. Help appreciated :-)
-   
+.. code-block:: bash
+	
+	sudo apt-get update
+	sudo apt-get install postgresql
+	
+Having a look at the install messages, you will guess quickly which is the version installed.
+Anyway you can check this with the following code:
+
+.. code-block:: bash
+	
+	psql --version
+	>>> psql (PostgreSQL) 9.4.5
+
+To be able to add the unaccent extension to your database, 
+you will have to install the following package where x.x are the first 2 parts of the version, 
+9.4 in this example.
+
+.. code-block:: bash
+
+	sudo apt-get install postgresql-contrib-x.x
+	
+You are ready to play with Postgressql.
+	
 .. note:: 
 
    To avoid installation and configuration of a postgresql server, you may use `our docker image <https://registry.hub.docker.com/u/chill/database/>`_ to start and configure a database as decribed in the basic installation chapter.
    This solution can be used also in a production environment.
+      
    
-.. note::
+Install PostresSql database
+###########################
 
-   Installing unaccent extension on ther server is possible with the package `postgresql-contrib-9.x` (replace 9.x with your server version). The extension may be enabled with running `CREATE EXTENSION unaccent;` in the database, with a superuser account.
+Here follows as an example the instructions that has been used on Ubuntu 14.04 distribution to install the Chill database.
+Feel free to customize it following your preferences, but do not forget to enable the `unaccent` extension on your database.
+
+.. code-block:: bash
+
+	sudo su
+	su postgres
+	psql
+		CREATE USER chill_user WITH PASSWORD 'my_terrible_secret' CREATEDB;
+		CREATE DATABASE chill_db OWNER chill_user LC_COLLATE 'en_US.UTF-8' LC_CTYPE 'en_US.UTF-8';
+	\q
+	psql -d chill_db
+		CREATE EXTENSION unaccent;
+	\q
+	exit
+	exit
+	
+When you will use composer to install Chill, you will have to provide some database information.
+If you follow this tutorial these will be:
    
+   - database_host: localhost
+   - database_port: 5432
+   - database_name: chill_db
+   - database_user: chill_user
+   - database_password: my_terrible_secret
+   - locale: en