On a server I have a public key auth only for root account. Is there any point of logging in with a different account?
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As root:
# chattr +i /home/ShortN0te/.bashrc
Anything else?
There are many ways to harden against it, but “just disable root auth” is not really it, since it in itself does not add much.
??
Seriously - if you’re “advising” on linux best practices, get lots of liability insurance.
So, you learned about .bashrc today, and you’re now an expert?
Perhaps stand down and let the experts have their say.