If you have looked at the Remixd docs and just need remixd command, here it is:
remixd -s absolute-path-to-the-shared-folder --remix-ide your-remix-ide-URL-instance
-
Connection will start a session between ${window.location.href} and your local file system ws://127.0.0.1:65520
+
Connection will start a session between ${window.location.origin} and your local file system ws://127.0.0.1:65520
so please make sure your system is secured enough (port 65520 neither opened nor forwarded).