Enabling a root access through SSH on open internet is surely a security vulnerability.
Hence, it is best to disable root access from the get-go.
All you have to do is to edit the SSH service’s config file /et/ssh/sshd_config
Use vi or nano or your favorite text editor and find below text:
#PermitRootLogin no
and update it to:
PermitRootLogin no
and then reboot the sshd service if you are already using root accout:
systemctl restart sshd.service
if you are not logged on as ‘root’, please don’t forget to sudo the above command:
sudo systemctl restart sshd.service
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