#vi /etc/ssh/sshd_config
Find this section in the file, containing the line with “PermitRootLogin” in it.
#LoginGraceTime 2m
#PermitRootLogin no
#StrictModes yes
#MaxAuthTries 6
Make the line look like this to disable logging in through ssh as root.
PermitRootLogin no
Then restart the sshd service:
# /etc/init.d/sshd restart
