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I use SSH to communicate with my Raspberry Pi (server) from my laptop (Putty client). I would like to disable root SSH login. I change the value of "PermitRootLogin" to no in the /etc/ssh/sshd_config. I restart ssh service via the cmd "sudo service ssh restart"

But, on Putty, I can always login with root password.

How can I disable root ssh login ?

Thx !

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  • This is strange-the Pi doesn't have a root password
    – Milliways
    Jun 15 '18 at 21:48
  • Does this persists after a system restart? Are you sure you didn't make a typo or edited the wrong file? Does "I can always login with root password" means you can login as root?
    – Dmitry Grigoryev
    Jun 25 '18 at 9:21
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You can allow or deny specific users in /etc/ssh/sshd_config by setting

# whitelist
AllowUsers pierrot arlecchino

# blacklist
DenyUsers innamorati pantalone

and then run sudo systemctl restart ssh. Be advised: Before you deny users, especially the default user "pi", make sure you can login by SSH with the allowed user, else you risk to lock out yourself!

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