this tutorial is really great! but i already installed nginx by following some tutorial in digital ocean.
Ngnix Inslatted by following: https://www.digitalocean.com/community/articles/how-to-install-linux-nginx-mysql-php-lemp-stack-on-ubuntu-12-04
Wordpress Inslatted by following: https://www.digitalocean.com/community/articles/how-to-install-wordpress-with-nginx-on-ubuntu-12-04
and now i was searching for problems related cache purging.
and found https://rtcamp.com/wordpress-nginx/tutorials/single-site/fastcgi-cache-with-purging/
can i simply install your Ngnix Helper Wordprsss plugin without doing all this stuff ^^