Find file by filename with mdfind
macOS comes with Apache webserver pre-installed – you just need to configure and active it. It starts with httpd.conf file, that is tricky to find unless you know where to look.
mdfind instantly solves this challenge:
greys@maverick:~ $ mdfind -name httpd.conf /private/etc/apache2/httpd.conf.pre-update /private/etc/apache2/original/httpd.conf /private/etc/apache2/httpd.conf