Nginx virtual host: PHP5-FPM-Sock error

server {
listen 80 default_server;
root /home/www/mydomain.com/public/;
index index.php index. html
access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log;
server_name mydomain.com;

 location ~ \.php${
 try_files $uri =404;
 fastcgi_index index.php;
 fastcgi_pass php5-fpm-sock;
 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
 fastcgi_read_timeout 240;
 include /etc/nginx/fastcgi_params;
}
 }

127.0.0.1 mydomain.com

sudo ln -s / etc/nginx/sites-available/mydomain.com /etc/nginx/sites-enabled/mydomain.com

service nginx restart 
Failed, var/log/nginx/error.log gives
 
 
no port in upstream "php5-fpm-sock" in /etc/nginx/sites-enabled/mydomain.com:12
What could be wrong? 

upstream php5-fpm-sock {
 server unix:/var/run/php5-fpm.sock;
}

I am trying to set up a new ubuntu/php5.5/nginx installation Virtual host

etc/nginx/sites_available/mydomain.com:

server {
listen 80 default_server;
root /home/www/mydomain.com/public/;
index index.php index.html
access_log /var/log/nginx/access.log;
error_log /var/log /nginx/error.log;
server_name mydomain.com;

location ~ \.php${
 try_files $uri =404;
 fastcgi_index index.php; 
 fastcgi_pass php5-fpm-sock;
 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
 fastcgi_read_timeout 240;
 include /etc/nginx/fastcgi_params;
}
 }

etc/hosts file:

127.0.0.1 mydomain.com

“sites-enabled Symbolic links in symbolic links in the folder:

sudo ln -s /etc/nginx/sites-available/mydomain.com /etc/nginx/sites-enabled/ mydomain.com

This

service nginx restart

Failed, var/log/nginx/error.log gives

p>

no port in upstream "php5-fpm-sock" in /etc/nginx/sites-enabled/mydomain.com:12

What could be wrong ?

Missing fpm address path:

nano /etc/nginx/conf.d/ php5-fpm.conf

Edit:

upstream php5-fpm-sock {
 server unix:/var/run/php5-fpm .sock;
}