nginx rewrite not working (with passenger on Mac OS X) - ruby-on-rails

Question

I have nginx with rewriting working correctly on my server in production.
But when I tried to set the same rule on my local development machine (mac) the rewrite doesn't seem to be working.
I want "universitytutor.local" to redirect to "www.universitytutor.local"
Here is the relevant part of my nginx.conf
server{
listen 80;
server_name universitytutor.local;
rewrite ^/(.*) http://www.universitytutor.local/$1 permanent;
}
server {
listen 80;
server_name www.universitytutor.local *.universitytutor.local;
root /Users/barmstrong/NetBeansProjects/universitytutor/public; # <--- be sure to point to 'public'!
passenger_enabled on;
rails_env development;
}
The page loads correctly whether I type "universitytutor.local" or "www.universitytutor.local" and it does not redirect.
I have the *.universitytutor.local in there because I use subdomains for different cities so I need this, but I want a blank subdomain to redirect to "www".
Any ideas?

Answer 1

Found the solution for this. I was not restarting Nginx correctly so it was not picking up the changes. Doh!
You can restart like this
sudo kill `cat /opt/nginx/logs/nginx.pid `
sudo /opt/nginx/sbin/nginx
or add this to your .bashrc for easier use
alias nginx_restart='nginx_stop; nginx_start'
alias nginx_start='sudo /opt/nginx/sbin/nginx'
alias nginx_stop='sudo kill `cat /opt/nginx/logs/nginx.pid `'