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Recently, I installed a new Ubuntu 22.04 LTS and found that it worked the first time I logged in, but then it didn't!

I did the following configurations, but the problem is not solved

sudo vi /etc/ssh/ssd_config
Port 22
PermitRootLogon yes
PasswordAuthentication yes


sudo ufw allow ssh
sudo ufw allow openssh

Here is the error message

debug1: Next authentication method: password
root@4.4.55.32's password: 
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
Permission denied, please try again.

So, I'm wanted to find how to handle it. Thanks

yan
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  • The root account in Ubuntu is disabled by default - have you actually set a root password? – steeldriver Apr 26 '24 at 10:39
  • Yes, I have set the root password with the command sudo passwd root. That's why I'm confused about the mechanism here, it's clear that the first time I logged in with ssh root@server-ip it worked, but the second time and after that with the password it didn't work! – yan Apr 26 '24 at 14:49

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