(In reply to Bernhard Wiedemann from comment #1) > when an admin wants to modify a .service file, he should first copy it to > /etc/systemd/system Of course he could keep a copy of his modified services file, but the upgrade of the package should ideally detect that the original hylafax_hfaxd.service has changed and put the new file as *.rpmnew in place, perserving the old configuration. I bet there is a RPM comand for it, but I did not find it so far...