config_si.php

<?php
$sugar_config_si = array(
    'setup_db_host_name' => 'localhost',
    'setup_db_database_name' => '{DB_NAME}',
    'setup_db_drop_tables' => 0,
    'setup_db_create_database' => 1,
    'setup_db_pop_demo_data' => 0,
    'setup_site_admin_password' => '{ADMIN_PASSWORD}',
    'setup_db_create_sugarsales_user' => 0,
    'setup_db_admin_user_name' => '{DB_USER}',
    'setup_db_admin_password' => '{DB_PASSWORD}',
    'setup_db_sugarsales_user' => '{DB_ALTERNATIVE_USER}',
    'setup_db_sugarsales_password' => '{DB_ALTERNATIVE_PASSWORD}',
    'setup_db_type' => 'mysql',
    'setup_license_key' => '{LICENSE_KEY}',
    'setup_site_url' => '{SITE_URL}',
    'setup_system_name' => '{SYSTEM_NAME}',
    'default_currency_iso4217' => 'USD',
    'default_currency_name' => 'US Dollars',
    'default_currency_significant_digits' => '2',
    'default_currency_symbol' => '$',
    'default_date_format' => 'Y-m-d',
    'default_time_format' => 'H:i',
    'default_decimal_seperator' => '.',
    'default_export_charset' => 'ISO-8859-1',
    'default_language' => 'en_us',
    'default_locale_name_format' => 's f l',
    'default_number_grouping_seperator' => ',',
    'export_delimiter' => ',',
);

SugarCRM Automatic Installation that is working for 7

Note: After file has been created type the following:

http://${hostname}:${webport}/sugarcrm/install.php?goto=SilentInstall&cli=true

where ${hostname} is the name of the host and ${webport} is the port number (if not 80). Generically, the install.php file is at the same location as the index.php file for the SugarCRM application, if the address does not match the one given above. Upon completion of the process, the installation should respond with Success, and you may navigate to the web address to find an installed version of SugarCRM.

The above code is proven working for instances without demo data