error 502 in ngin php5-fpm

unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable)

• http://stackoverflow.com/questions/10470109/error-502-in-nginx-php5-fpm/10470827#10470827
• http://stackoverflow.com/questions/25098029/connect-to-unix-var-run-php5-fpm-sock-failed-what-is-wrong-with-my-setup

（1）vim /etc/php5/fpm/pool.d/www.conf 

search for

listen = /var/run/php5-fpm.sock

and replace it for

listen = 127.0.0.1:7777

（2）vim /etc/nginx/nginx.conf 

replace (or comment)

fastcgi_pass unix:/var/run/php5-fpm.sock;

with

fastcgi_pass 127.0.0.1:7777;

（3）重启

sudo service php5-fpm restart

 sudo /etc/init.d/php5-fpm restart

nginx -s reload