How to disable XML-RPC from Linux command-line in a total way?

I read near the end of this guide regarding utilizing SSHguard to protect WordPress from Brute force attacks that after configuring SSHguard the relevant way, one must:

disable XML-RPC by blocking all remote access to /xmlrpc.php in your
web server configuration.

• I don’t use XML-RPC in any of my websites.

• I use Nginx as my web server.

I’m not sure what is the best way to totally block XML-RPC. Nginx conf for each site? WP-CLI operation per site?

What is the common way to do so?

On nginx, to block access to the xmlrpc.php file, add this location block to the server block of your configuration file:

location ~ ^/(xmlrpc\.php) {
  deny all;
}