System and Service Credentials| systemd.io
If your application requires a password, SSH private key, TLS Certificate, or any other kind of sensitive data, you shouldn't pass it alongside your configs.| Diogo Mónica
June 15th, 2015| www.netmeister.org
November 5th, 2015| www.netmeister.org
February 20th, 2019| www.netmeister.org