How do I restart nginx only after the configuration test was successful on Ubuntu?

How do I restart nginx only after the configuration test was successful on Ubuntu?

ubuntu command-line nginx

nginx

Running command line PHP through PHP-FPM

command-line nginx php

nginx

NGINX brew install command not found

bash command-line nginx homebrew .bash-profile

nginx

Failed to reload nginx.service: Interactive authentication required

php symfony nginx command-line

nginx