我一直在 Ubuntu 终端中使用 ssh 到我的学校服务器做作业，但不知何故这不再起作用了，我确信这不是由学校服务器引起的，因为我可以在其他地方通过 ssh 连接到它。这是我使用ssh -v blah@linux.student.cs.ublah.ca
-v 标签的命令行给出以下输出
OpenSSH_5.5p1 Debian-4ubuntu4, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to linux.student.cs.uwaterloo.ca [129.97.167.126] port 22.
debug1: Connection established.
debug1: identity file /home/cs136/.ssh/id_rsa type -1
debug1: identity file /home/cs136/.ssh/id_rsa-cert type -1
debug1: identity file /home/cs136/.ssh/id_dsa type -1
debug1: identity file /home/cs136/.ssh/id_dsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debian-
4ubuntu6local2
debug1: match: OpenSSH_5.5p1 Debian-4ubuntu6local2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.5p1 Debian-4ubuntu4
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: Host 'linux.student.cs.uwaterloo.ca' is known and matches the RSA host key.
debug1: Found key in /home/cs136/.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
Connection closed by 129.97.167.126
任何人都可以告诉什么是错的？？