NGINX – /var/run/php5-fpm.sock failed (2: No such file or directory)

This is instructions how to solve this nginx errors : [crit] 25422#0: *1 connect() to unix:/var/run/php5-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 127.0.0.1, server: localhost, request: “GET / HTTP/1.1”, upstream: “fastcgi://unix:/var/run/php5-fpm.sock:”, host: “www..” [crit] 25422#0: *11 connect() to unix:/var/run/php5-fpm.sock failed (13: Permission denied) while connecting to upstream, client: 127.0.0.1,…