If you use Macports (much more consistent than homebrew and much more attentive to the way MacOS works and MacOS SIP etc works) then installing the GNU utils ports gives you a standard GNU environment, so pretty close to Ubuntu/Fedora etc.

Of course, networking etc and DNS and other system services will be the native MacOS, but MacOS is a Unix. It has its own init with launchtl and DNS/mDNS with scutil and mDNSResponder.