如果我尝试通过SSH连接到我的远程服务器，我会坚持这个，我无法弄清楚如何继续。
tiziano@tiziano-HP ~ $ ssh -Tvvv -p 21 username@example.com
OpenSSH_6.2p2 Ubuntu-6ubuntu0.3, OpenSSL 1.0.1e 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to example.com [10.10.10.10] port 21.
debug1: Connection established.
debug3: Incorrect RSA1 identifier
debug3: Could not load "/home/tiziano/.ssh/id_rsa" as a RSA1 public key
debug1: identity file /home/tiziano/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/tiziano/.ssh/id_rsa-cert type -1
debug1: identity file /home/tiziano/.ssh/id_dsa type -1
debug1: identity file /home/tiziano/.ssh/id_dsa-cert type -1
debug1: identity file /home/tiziano/.ssh/id_ecdsa type -1
debug1: identity file /home/tiziano/.ssh/id_ecdsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2p2 Ubuntu-6ubuntu0.3
debug1: ssh_exchange_identification: 220 (vsFTPd 2.0.5)
debug1: ssh_exchange_identification: 530 Please login with USER and PASS.
很可能上面显示的用户名和域名（ip addres）是假的，我改了它们。