Comment by Propelloni

That's depends what you want to do. If you want an all-in-one solution you'd go with the solution of your distribution vendor, e.g. Red Hat IPA/Satellite, SUSE Manager, or Ubuntu Landscape. Linux just plays nicer with ADS than MS Windows with any Linux solution, so most fall back to ADS in mixed environments.

If you only want Identity, Policies and Audit trails over several different Linux distributions, FreeIPA is your weapon of choice. It is clicky and requires no scripting. Just like ADS it is a bit of a pain to get into, but easier to run than OpenLDAP ;) If you want OpenID, too, connect FreeIPA and Keycloak, but you will need to dive onto the CLI. For configuration management connect Saltstack, here you have to edit rules files.