Adding new systemd service, for example just requires me to put a file into `/etc/systemd/system`. Many other applications work like this as well: Apache config

Adding new systemd service, for example just requires me to put a file into `/etc/systemd/system`. Many other applications work like this as well: Apache configs, /etc/sudoers.d on Debian, more examples in `/etc/?.d` It's generally a good practice to make your system open for extension but closed to modifications [1]. There is no reason, the user database can not work the same way. Just have the system scan `/etc/passwd.d/*` on boot/reload and drop files there. [1] https://drive.google.com/file/d/0BwhCYaYDn8EgODUxZTJhOWEtMTZlMi00OWRiLTg0ZmEtZWQ5ODRlY2RmNDlk/view https://drive.google.com/file/d/0BwhCYaYDn8EgODUxZTJhOWEtMTZ...