[Oracle DataBase Server 12.1 installation on Oracle Linux 6.7]: Restrict remote access by user root
# vi /etc/ssh/sshd_config
Replace
#PermitRootLogin yes
on
PermitRootLogin no
# service sshd restart
# vi /etc/ssh/sshd_config
Replace
#PermitRootLogin yes
on
PermitRootLogin no
# service sshd restart