Permissions of tmp and cache folder in rails for nginx (To resolve access denied)

rails_cache_permissions_for_nginx.md

In order to have your cache always created with a group of www-data you need to do the following:

cd yourrailsapp
chgrp www-data ./tmp
sudo chmod g+s tmp

This sets the group id on your folder so that everything underneath tmp gets created with the correct permissions

References:

• https://mdreeling.wordpress.com/2012/06/16/permissions-of-tmp-and-cache-folder-in-rails-for-nginx-to-resolve-access-denied/
• http://stackoverflow.com/questions/8127849/rails-3-1-errnoeacces-permission-denied/12700438#12700438
• http://serverfault.com/questions/357108/what-permissions-should-my-website-files-folders-have-on-a-linux-webserver