我在运行（FreeBSD的9阿美阿美-8cce3fe5）的EC2实例，我可以ssh到它使用我的亚马逊创建的密钥文件，没有密码的提示，没有问题。

I have an EC2 instance running (FreeBSD 9 AMI ami-8cce3fe5), and I can ssh into it using my amazon-created key file without password prompt, no problem.

不过，当我想使用scp我被要求输入密码才能将文件复制到该实例：

However, when I want to copy a file to the instance using scp I am asked to enter a password:

scp somefile.txt -i mykey.pem root@my.ec2.id.amazonaws.com:/

Password:

任何想法，为什么发生这种情况/怎么能说是prevented？

Any ideas why this is happening/how it can be prevented?

在此先感谢！

霍夫

推荐答案

想通了，有错误的顺序参数，这个工程：

figured it out, had the arguments in the wrong order, this works:

scp -i  mykey.pem somefile.txt root@my.ec2.id.amazonaws.com:/