我有一个运行ubuntu的EC2实例，我使用putty连接到这个实例。我正在尝试将一些文件上传到此实例，但一次又一次获得权限被拒绝公钥错误。以下是我尝试但收到相同错误的命令。
login as: ubuntu
Authenticating with public key "imported-openssh-key"
Welcome to Ubuntu 14.04.1 LTS (GNU/Linux 3.13.0-44-generic x86_64)
* Documentation: https://help.ubuntu.com/
System information as of Wed Mar 25 05:21:29 UTC 2015
System load: 0.0 Processes: 147
Usage of /: 11.8% of 15.61GB Users logged in: 1
Memory usage: 47% IP address for eth0: 172.31.24.22
Swap usage: 0%
ubuntu@ip-172-31-24-22:/var/www/html$ scp -r \xampp\htdocs\bucketsorter\index.php ubuntu@ip-172-31-24-22:home/ubuntu/var
Permission denied (publickey).
lost connection
ubuntu@ip-172-31-24-22:/var/www/html$ scp -r -v \xampp\htdocs\bucketsorter\index.php ubuntu@ip-172-31-24-22:home/ubuntu/var
Executing: program /usr/bin/ssh host ip-172-31-24-22, user ubuntu, command scp -v -r -t home/ubuntu/var
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 *
debug1: Connecting to ip-172-31-24-22 [172.31.24.22] port 22.
debug1: Connection established.
debug1: identity file /home/ubuntu/.ssh/id_rsa type -1
debug1: identity file /home/ubuntu/.ssh/id_rsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_dsa type -1
debug1: identity file /home/ubuntu/.ssh/id_dsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_ecdsa type -1
debug1: identity file /home/ubuntu/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_ed25519 type -1
debug1: identity file /home/ubuntu/.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
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA e9:2c:36:dd:be:72:1e:8a:cd:4d:1d:71:be:38:51:20
debug1: Host 'ip-172-31-24-22' is known and matches the ECDSA host key.
debug1: Found key in /home/ubuntu/.ssh/known_hosts:2
debug1: ssh_ecdsa_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
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/ubuntu/.ssh/id_rsa
debug1: Trying private key: /home/ubuntu/.ssh/id_dsa
debug1: Trying private key: /home/ubuntu/.ssh/id_ecdsa
debug1: Trying private key: /home/ubuntu/.ssh/id_ed25519
debug1: No more authentication methods to try.
Permission denied (publickey).
lost connection
ubuntu@ip-172-31-24-22:/var/www/html$ scp -r -v -i \Users\Rohan\Desktop\fall2014 courses\research\bucketsort-aws.pem \xampp\htdocs\bucketsorter\index.php ubuntu@ip-172-31-24-22:home/ubuntu/var
Executing: program /usr/bin/ssh host ip-172-31-24-22, user ubuntu, command scp -v -r -d -t home/ubuntu/var
Warning: Identity file UsersRohanDesktopfall2014 not accessible: No such file or directory.
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 *
debug1: Connecting to ip-172-31-24-22 [172.31.24.22] port 22.
debug1: Connection established.
debug1: identity file /home/ubuntu/.ssh/id_rsa type -1
debug1: identity file /home/ubuntu/.ssh/id_rsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_dsa type -1
debug1: identity file /home/ubuntu/.ssh/id_dsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_ecdsa type -1
debug1: identity file /home/ubuntu/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_ed25519 type -1
debug1: identity file /home/ubuntu/.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
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA e9:2c:36:dd:be:72:1e:8a:cd:4d:1d:71:be:38:51:20
debug1: Host 'ip-172-31-24-22' is known and matches the ECDSA host key.
debug1: Found key in /home/ubuntu/.ssh/known_hosts:2
debug1: ssh_ecdsa_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
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/ubuntu/.ssh/id_rsa
debug1: Trying private key: /home/ubuntu/.ssh/id_dsa
debug1: Trying private key: /home/ubuntu/.ssh/id_ecdsa
debug1: Trying private key: /home/ubuntu/.ssh/id_ed25519
debug1: No more authentication methods to try.
Permission denied (publickey).
lost connection
ubuntu@ip-172-31-24-22:/var/www/html$
我也尝试使用root作为用户。我一直试图弄清楚它自6个小时以来现在真的很沮丧。我是linux的新手。请帮我解决这个问题。提前谢谢
答案 0 :(得分：0)
$ scp -r -v -i \Users\Rohan\Desktop\fall2014 courses\research\bucketsort-aws.pem \xampp\htdocs\bucketsorter\index.php ubuntu@ip-172-31-24-22:home/ubuntu/var
为什么在上面的命令中使用反斜杠？你究竟在做什么？
此外，如果要将文件从本地Windows工作站复制到远程EC2 Linux盒，请使用FileZilla，WinSCP或BitWise之类的东西。
PuTTy无法传输文件。
此外，ubuntu@ip-172-31-24-22:home/ubuntu/var应为ubuntu@ip-172-31-24-22:/home/ubuntu/var（在home之前注意 / ）
答案 1 :(得分：0)
在示例终端输出中，您的前两次scp尝试甚至都没有尝试进行身份验证。远程系统只接受公钥认证（不是密码），而ssh没有任何公钥可以通过认证。
在你的第三次scp尝试中，有这样的：
$ scp -r -v -i \Users\Rohan\Desktop\fall2014 courses\research\bucketsort-aws.pem \xampp\htdocs\bucketsorter\index.php ubuntu@ip-172-31-24-22:home/ubuntu/var
Executing: [...]
Warning: Identity file UsersRohanDesktopfall2014 not accessible: No such file or directory.
你告诉它使用密钥文件＆＃34; \ Users \ Rohan \ Desktop \ fall2014 courses \ research \ bucketsort-aws.pem＆＃34;没有引号。 Scp最终寻找一个名为＆＃34; UsersRohanDesktopfall2014＆＃34;的密钥文件。它无法找到此密钥，因此无法再进行身份验证。
首先，密钥文件的名称包含一个空格，因此必须用引号括起来将其视为单个命令行参数。其次，看起来命令行上的反斜杠正在被破坏，所以请尝试使用正斜杠：
$ scp -r -v -i "/Users/.../fall2014 courses/research/bucketsort-aws.pem" /xampp/.../index.php ubuntu@ip-172-31-24-22:home/ubuntu/var
这是在Windows上？如果scp仍然抱怨无法找到密钥文件，请添加驱动器说明符：
$ scp -r -v -i "C:/Users/.../fall2014 courses/research/bucketsort-aws.pem" /xampp/.../index.php ubuntu@ip-172-31-24-22:home/ubuntu/var