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1. Requires a Unix or Unix like operating system
2. Requires a web server (e.g apache web server) with PHP 5.4 or higher. Make sure have enabled mod_rewrite module in httpd.conf file and enable PHP SOAP extension
3. Install Composer
4. MYSQL database installation (Required if the user is hosting Airavata on his own. To communicate with SciGaP this step is not relevant)
5. MCrypt PHP extension
6. Enable OpenSSL PHP extension
7. Follow instructions given in links to install the prerequisites based on the OS ;
   1. On Ubunutu: http://www.dev-metal.com/install-laravel-4-ubuntu-12-04-lts/
   2. On Centos: https://www.digitalocean.com/community/tutorials/how-to-install-laravel-4-on-a-centos-6-vps
   3. On MAC OS: http://sangatpedas.com/20140219/installing-laravel-osx-mavericks/
8. Important: Do not need to install Laravel. You can skip the steps given on the links

Installing PGA in Ubuntu OS

1. Download PGA from github to the document root of you web server /var/www. 
2. Use git clone https://github.com/apache/airavata-php-gateway.git or download the zip from the github web page.
3. Go inside the PGA directory (e.g /var/www/airavata-php-gateway)
4. Make sure the storage folder is writable
   1. sudo chmod -R 777 app/storage
5. Go to [PGA_HOME]/app/config/pga_config.php and change the configuration to match your settings
   
6. Now issue composer update command
   1. sudo composer update
7. Restart the web server
   1. sudo service apache2 restart

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Installing PGA in MAC OS

Installing Prerequisites

1. To install MCrypt for PHP on MAC please follow the steps in http://coolestguidesontheplanet.com/install-mcrypt-php-mac-osx-10-9-mavericks-development-server/
2. Once above is completed follow the steps given in http://sangatpedas.com/20140219/installing-laravel-osx-mavericks/ for
   1. Configuring Apache
   2. Installing Composer 

Download and Configure PGA

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