I am extremely new to this so please don't shoot me down:

I have set up a Linode running Ubuntu, It is all sort of working except Nginx.

I am following this guide: http://rubysource.com/deploying-a-rails-application/

And this for nginx: http://library.linode.com/web-servers/nginx/installation/ubuntu-10.04-lucid

When I go to my IP, I get a 500 internal server error.

I have tried starting nginx and it looks like it starts fine. I run this:

ps awx | grep nginx

and I get:

 308 ?        Ss     0:00 nginx: master process /usr/sbin/nginx
 2309 ?        S      0:00 nginx: worker process
 2311 ?        S      0:00 nginx: worker process
 2312 ?        S      0:00 nginx: worker process
 2313 ?        S      0:00 nginx: worker process
 2850 pts/0    S+     0:00 grep --color=auto nginx

I really am not sure what else to do to get it running. Any help?

Neil