Hello,
I have done this million of times on many different systems but still failing brutally. What I have done:
Created id_rsa.pub
Copied id_rsa.pub into authorized_keys over my unraid server
chmod 700 /root/.ssh
chmod 600 /root/.ssh/authorized_keys
Edited /etc/ssh/sshd_config to accept keys
restart ssh
It still ask the password or if I try to connect using the key gives me Permission denied (publickey,password,keyboard-interactive).