인증없이 ssh or scp 전송
- client에 authorized_keys 값 존재해야됨
ex) ssh -o IdentityFile=/PATH/
id_rsa -o UserKnownHostsFile=/PATH/
known_hosts -p '22' 'root'@'XXX.XXX.XXX.XXX'
or
ssh -o IdentityFile=/PATH/id_rsa -o UserKnownHostsFile=/PATH/Client.Key -p '22' 'root'@'XXX.XXX.XXX.XXX'