Thanks both of you for your answer!
I haven't tried this on other init level than 5, but what I did to disable the services I didn't want was:
Code:
$ systemctl list-units --all | grep .service > services-status.txt
With that I get the full list of services (all of them, actives and inactives).
And then just went one by one doing:
Code:
$ systemctl disable SERVICENAME.service
to disable services to not start on bootup. And:
Code:
$ systemctl disable SERVICENAME.service
to enable services to start on bootup.
You can also use
systemadm on the terminal and it will open a GUI with the same information you'll get using
systemctl list-units --all, just be aware that most of the controls are not working properly.
Hopefully this will help someone else!