To configure Nginx to use PHP-FPM Unix sockets for better performance, you will need to perform the following steps:
Install Nginx and PHP-FPM on your server if you haven't already done so.
Open the Nginx configuration file using a text editor. The location of this file may vary depending on your server configuration, but it is commonly found at /etc/nginx/nginx.conf or /etc/nginx/sites-available/default.
Locate the block of code that starts with location ~ \.php$ { or similar. Inside this block, you should see a line that starts with fastcgi_pass. This line specifies the address of the PHP-FPM server.
Replace the IP address or hostname specified in the fastcgi_pass line with the path to the PHP-FPM Unix socket. The Unix socket file can usually be found at /var/run/php/phpX.X-fpm.sock, where X.X is the PHP version. For example, if you are using PHP 7.4, the path should be /var/run/php/php7.4-fpm.sock.
The updated fastcgi_pass line should look like this:
fastcgi_pass unix:/var/run/php/phpX.X-fpm.sock;
Save the changes to the Nginx configuration file and exit the text editor.
Test the configuration to ensure there are no syntax errors. Run the following command:
sudo nginx -t
If the test is successful, reload Nginx to apply the new configuration:
sudo systemctl reload nginx
At this point, Nginx should be configured to use PHP-FPM Unix sockets for better performance. You can verify the configuration by visiting a PHP file on your server using a web browser and checking that it is executed correctly.