On Tue, Jul 25, 2017 at 7:38 AM, Patrick Dupre <pdupre@gmx.com> wrote:

But a GUI is a lot more convenience to manage the services.

Try cockpit, it's web based but works quite well.

 
How do I manage /etc/services ?

You don't.
 
or the firewall?

firewall-config

Thanks,
Richard