Installation of authpuppy and prerequisites in Debian

sudo apt-get install apache2
sudo apt-get install php5

These following commands are optionnals but may be help a lot.
 sudo apt-get update
 sudo apt-get upgrade --show-upgraded
end of optionnal commands

sudo apt-get install postgresql postgresql-contrib (if you plan to use postresql database)
or
sudo apt-get install mysql-server (if you plan to use mysql database)

*** Both of them (mysql or postgres) are on the same level. Using one of them is only a question of choice ***

sudo apt-get install php5-dev
sudo apt-get install php-pear
sudo apt-get install apache2-prefork-dev build-essential
pecl install apc

in the dynamic extensions part of php.ini
add extension=apc.so in /etc/php5/apache2/php.ini
add extension=apc.so in /etc/php5/cli/php.ini

change short_open_tag=on to off in php.ini (apache dir and cli dir)

by doing
sudo nano /etc/php5/apache2/php.ini
ctrl o ctrl x when everything is written

sudo nano /etc/php5/cli/php.ini
ctrl o ctrl x when everything is written

add subdirectory "authpuppy" in /var/log/apache2
by doing this
cd /var/log/apache2
sudo mkdir authpuppy
cd /

sudo a2enmod rewrite
sudo /etc/init.d/apache2 restart

sudo apt-get install php5-pgsqlp (if you are using postgresql database)
sudo apt-get install php5-mysql (if you are using mysql database)

To make sure that pdo and pdo-mysql or pdo and pdo-pgsql are correctly installed
type this command

sudo php -m

and you should see them among all the php5 modules installed.

sudo apt-get install php5-curl
sudo apt-get install php5-xsl

download last version of authpuppy, copy it in the root tmp dir

cd /tmp
sudo tar xvzf authpuppy-<version>-<stability>_<packaging>.tgz
sudo mv authpuppy /var/www/

add these following lines in httpd.conf in the /etc/apache2 directory
by doing
sudo nano /etc/apache2/httpd.conf and copy and paste these following lines

<VirtualHost *:80>
       ServerAdmin webmaster@localhost
       ServerName authpuppy.localhost
       ServerAlias authpuppy.test

       DocumentRoot /var/www/authpuppy/web
       DirectoryIndex index.php
       <Directory /var/www/authpuppy/web/>
               Options Indexes FollowSymLinks MultiViews
               AllowOverride All
               Order allow,deny
               allow from all
       </Directory>

       Alias /sf /var/www/authpuppy/lib/vendor/symfony/data/web/sf
       <Directory "/var/www/authpuppy/lib/vendor/symfony/data/web/sf">
               AllowOverride All
               Allow from All
       </Directory>

       ErrorLog /var/log/apache2/authpuppy/error.log

       # Possible values include: debug, info, notice, warn, error, crit,
       # alert, emerg.
       LogLevel warn

       CustomLog /var/log/apache2/authpuppy/access.log combined

</VirtualHost>

ctrl-o ctrl-x

Note : To make sure that authpuppy will be launched correctly, it can help that the hosts
 file in /etc directory have this line

 127.0.0.1 authpuppy.localhost

 by doing

        sudo nano /etc/hosts
        ctrl-o ctrl-x

Now, do these commands in terminal :

cd /var/www/authpuppy

sudo chown -R a+w config
sudo chown -R www-data cache
sudo chown -R www-data log
sudo chown -R www-data data
sudo chown -R www-data plugins
sudo chown -R www-data web

cd /

if you are using postgresql :

   sudo -s -u postgres
   createuser authpuppy --pwprompt
   type n for each questions
   createdb authpuppy --encoding=UTF-8 --owner=authpuppy

   Type exit

if you are using mysql

   user@yourserver $> mysqladmin -uroot -p create authpuppy
   Enter password: #Enter the root password
   user@yourserver $> mysql -uroot -p
   Enter password:
   Welcome to the MySQL monitor. Commands end with ; or \g.
   Your MySQL connection id is 45
   Server version: 5.0.51a-3ubuntu5.5 (Ubuntu)

   Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

   mysql> create user 'authpuppy'@'localhost' identified by 'authpuppydev';
   Query OK, 0 rows affected (0.21 sec)

   mysql> grant all privileges on authpuppy.* to 'authpuppy'@'localhost'
   with grant option;
   Query OK, 0 rows affected (0.02 sec)

   Type exit

Everything's may be ok now.

To make sure that you have a proper and clean installation
type :

symfony cc

in the /var/wwww/authpuppy directory.

Use your internet browser and type : http://authpuppy.localhost

***Do not use chromium browser, there's a bug in it about opening local web server***