[root@remote]# echo "PasswordAuthentication no" >> /etc/ssh/sshd_config [root@remote]# echo "PermitRootLogin no" >> /etc/ssh/sshd_config [root@remote]# echo "PermitEmptyPasswords no" >> /etc/ssh/sshd_config [root@remote]# echo "AllowUsers hoge" >> /etc/ssh/sshd_config [root@remote]# /etc/init.d/sshd restart