.


vi /etc/ssh/sshd_config
#PermitRootLogin yes의 주석을 풀고 no 로 변경

+++++++++++++++++ 예 시(sshd_config) ++++++++++++++++++++++++++++++++

생략.............................

# Authentication:

#LoginGraceTime 2m
#PermitRootLogin yes
PermitRootLogin no


#StrictModes yes
#MaxAuthTries 6

생략.............................

.