причина ошибки с php fpm

sudo /etc/init.d/php55-fpm restart 

получаем

Gracefully shutting down php55-fpm warning, no pid file found - php55-fpm is not running ?
Test php55-fpm configuration /etc/init.d/php55-fpm: 145: /etc/init.d/php55-fpm: /home/qwe/usr/lib/php55/php-fpm-checkconf: not found
failed

-- указываем префикс как корень:

sudo nano /etc/init.d/php55-fpm