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 po

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.