Remove publickey from ssh login - linux

Question

I'm trying to connect to an embedded board of mine through ssh. But upon trying to connect through ssh -v -l root user#xx.xx.xx.xx, I get a series of debug comments:
dico#lithya:~$ sudo ssh -v -l root dico#foxboard2
OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 22: Applying options for *
debug1: Connecting to foxboard2 [10.251.145.180] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debian-6
debug1: match: OpenSSH_5.5p1 Debian-6 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA 18:14:33:1e:88:5f:ad:13:78:9f:36:10:b9:d2:27:e4
debug1: Host 'foxboard2' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Trying private key: /root/.ssh/id_ecdsa
debug1: No more authentication methods to try.
Permission denied (publickey,password).
The connection is being established through port 22 so that isn't the problem. So, clearly there is a problem with public/private key authentication. Therefore, how can I make sure that the private/public keys through both my machine and the board are in sync? Or better yet, how do I solve this issue or completely remove any keys?
UPDATE
I've tried to connect to the board by specifying no public key authentication by ssh -o PubkeyAuthentication=no dico#foxboard2, but now it's asking me for a password. I've checked the site but the password I type is incorrect. How can I remove a password request?

Answer 1

You can copy your public key to the server using:
ssh-copy-id user#xx.xx.xx.xx
It is always better to use keys than passwords.

Answer 2

Make sure your ~/.ssh directory is set to mode 700 (chmod 700 ~/.ssh) and your ~/.ssh/authorized_keys is set to mode 600 (chmod 600 ~/.ssh/authorized_keys).
In your /etc/ssh/sshd_config file set PasswordAuthentication no to turn off password logins.