Ubuntu14.04 SSH登录出现Read from socket failed: Connection reset by peer

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下面是调试信息
$ ssh -vvv localhost
OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
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 localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/xtfge/.ssh/id_rsa type -1
debug1: identity file /home/xtfge/.ssh/id_rsa-cert type -1
debug1: identity file /home/xtfge/.ssh/id_dsa type -1
debug1: identity file /home/xtfge/.ssh/id_dsa-cert type -1
debug1: identity file /home/xtfge/.ssh/id_ecdsa type -1
debug1: identity file /home/xtfge/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/xtfge/.ssh/id_ed25519 type -1
debug1: identity file /home/xtfge/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8 pat OpenSSH_6.6.1* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
Read from socket failed: Connection reset by peer