我正在尝试登录我在 EC2 上的实例，但到目前为止我还没有成功。我提供了我尝试过的所有相关命令和事情的输出。我已经完成了作业并环顾四周，我仍然无法解释为什么我无法登录。
密钥对是使用亚马逊 AWS 控制台在线生成的，我在本地下载了私有文件。它的chmod'ed到600。
$ ec2-describe-keypairs
KEYPAIR gsg-keypair bb:ac:f0:5f:5b:c8:24:47:16:a8:93:35:37:1c:b3:c3:84:68:80:e1
$ ec2-run-instances ami-8d18f5e4 -k gsg-keypair
INSTANCE i-2dcea041 ami-8d18f5e4 pending gsg-keypair 0 m1.small 2011-02-09T10:50:50+0000 us-east-1c aki-a71cf9ce ari-a51cf9cc monitoring-disabled instance-store xen
$ ec2-describe instances
INSTANCE i-2dcea041 ami-8d18f5e4 ec2-75-101-249-242.compute-1.amazonaws.com domU-12-31-39-00-5D-D2.compute-1.internal running gsg-keypair 0 m1.smal2011-02-09T10:50:50+0000 us-east-1c aki-a71cf9ce ari-a51cf9cc monitoring-disabled 75.101.249.242 10.254.98.32 instance-store
我也成功运行了 ec2-authorize default -p 22。
ssh 的输出是：
$ ssh -v -i id_rsa-gsg-keypair root@ec2-75-101-249-242.compute-1.amazonaws.com
OpenSSH_5.1p1 Debian-6ubuntu2, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to ec2-75-101-249-242.compute-1.amazonaws.com [75.101.249.242] port 22.
debug1: Connection established.
debug1: identity file id_rsa-gsg-keypair type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-6ubuntu2
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc 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
The authenticity of host 'ec2-75-101-249-242.compute-1.amazonaws.com (75.101.249.242)' can't be established.
RSA key fingerprint is d0:ae:58:59:88:b8:58:ae:ab:dc:6f:a0:14:d5:f2:51.
Are you sure you want to continue connecting (yes/no)? yes
Failed to add the host to the list of known hosts (/home/meh/.ssh/known_hosts).
debug1: ssh_rsa_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
debug1: Next authentication method: publickey
debug1: Trying private key: id_rsa-gsg-keypair
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).
任何帮助将不胜感激。我已经尝试了一百万件事，但仍然无法弄清楚发生了什么。
谢谢。