Are you sure you want to continue connecting (yes/no)? yes
Failed to add the host to the list of known hosts (/home/a1/.ssh/known_hosts).
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
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: Offering RSA public key: /home/a1/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
Agent admitted failure to sign using the key.
debug1: Trying private key: /home/a1/.ssh/id_dsa
debug1: Trying private key: /home/a1/.ssh/id_ecdsa
debug1: Trying private key: /home/a1/.ssh/id_ed25519
debug1: Next authentication method: password