I've got the CoreOS running and I would like to remove the ability to login using passwords to the sshd.
I went through the docs of the CoreOS in here, but I am quite new to the systemd. I went through the man page, but I am a bit lost on it.
I know I have to create a dropin file inside
/etc/system.d/system/, but I have no idea, in which section of the file, should I put the
PasswordAuthentication no option. Since I work remotely, I don't want to screw up and not be able to login again...
I would be grateful for some guidance.