How to enable Drupal Clean URL with Nginx

Install Drupal with Nginx, default, you can’t enable the Clean URL
function, you have to edit nginx.conf file and add the URL rewrite
rules.

If Drupal install in the root directory,

if (!-e $request_filename) {
rewrite  ^/(.*)$   /index.php?q=$1  last;
break;
}

if drupal in a subdirectory,

if ($request_uri ~* ^.*/.*$) {
rewrite ^/(/w*)/(.*)$  /$1/index.php?q=$2 last;
break;
}