First install Composer and PHP for the jailed user. This article has the steps composer require aws/aws-sdk-php — as the jailed user There might be an error – fopen(/usr/share/php/Composer/Autoload/../../../doc/composer/copyright): failed to open stream: No such file or directory You can copy the file using the root login mkdir -p /var/www/clients/client1/web1/usr/share/doc/composer cp /usr/share/doc/composer/copyright /var/www/clients/client1/web1/usr/share/doc/composer/ chown web1:client1… Continue reading Installing Amazon SDK on ISPConfig systems