linux - ssh public key authentication

Friday, December 6, 2019

I have tried to configure ssh to use public key authentication

/etc/ssh/sshd_config has got this parameters.

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile  .ssh/authorized_keys

PasswordAuthentication yes

But I'm still being prompted for password. If I use

PasswordAuthentication no

I can't login

Any suggestion?

It works but only for root user.

My problem was, I had this parameter

PermitRootLogin no.

I can login with keys with root user if I use

PermitRootLogin yes.

In the system there is only a /root/.ssh directory an authorized_keys file in this directory

How can I add this to other users, if there isn't, in this system, a home/$USER/.ssh directory and authorized_keys file for each user?

Is there a way to configure for each user?
I will need diferent authorized_keys files for each user.

Is possible to configure for a different hosts, domains or ips? similar to httpd.conf

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