This post will help with How to Disable root SSH login on Linux.
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Providing direct login access to root via SSH is not a good practice. Administrators should use sudo to switch to root after logged in as themselves. this will helpful in auditing in terms of security.
Here is the step by step procedure to disable/deny direct root login via SSH
How to Disable root SSH login on Linux
Login to the server as Root, Edit the file /etc/ssh/sshd_config and search for the line,
and then change the value of it to,
Restart the sshd service
service sshd restart
systemctl reload sshd
Hope the post helped you to disable root SSH login on Linux.
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