NGINX: connect() to unix:/var/run/php7.0-fpm.sock failed (2: No such file or directory)
Had the same problem.Solution is very easy.
In nginx conf file you are trying upstreaming to
unix:/var/run/php7.0-fpm.sock
Correct path is
unix:/var/run/php/php7.0-fpm.sock
There is a mention about this in the documentation
Nginx communicates with PHP-FPM using a Unix domain socket. Sockets map to a path on the filesystem, and our PHP 7 installation uses a new path by default:
PHP 5
/var/run/php5-fpm.sockPHP 7
/var/run/php/php7.0-fpm.sock
In Ubuntu 18.04 the problem for me was that it's currently using PHP 7.2, but the sites-available default file has:
fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
Updating the version on that line so that it's the 7.2 instead of 7.0 fixed the issue for me.
fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;