为什么我不能 ssh-copy-id 到 EC2 实例？

Question

我在 EC2 上有一个 ubuntu Natty 实例，我可以通过 SSH 连接到它

ssh -v -i ec2-keypair ubuntu@ubuntu@XXXX.compute-1.amazonaws.com

但我想设置密码少 sshing。所以我尝试了这些选项，但没有任何效果：

 $ ssh-copy-id -i ~/.ssh/id_rsa.pub ubuntu@XXXX.compute-1.amazonaws.com
Permission denied (publickey).

 $ ssh-copy-id -i ~/.ssh/ec2-keypair ubuntu@XXXX.compute-1.amazonaws.com
/usr/bin/ssh-copy-id: ERROR: No identities found

 $ ssh-copy-id -i ~/.ssh/id_rsa.pub root@XXXX.compute-1.amazonaws.com
Permission denied (publickey).

Answer 1

我需要跑

ssh-add ~/.ssh/ec2-keypair