mac上为何ssh-copy-id不好使？

Question

提示如下：
执行

sh-copy-id root@10.0.7.254

/usr/local/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/usr/local/bin/ssh-copy-id: WARNING: All keys were skipped because they already exist on the remote system.

Answer 1

“All keys were skipped because they already exist on the remote system”
说的不是很清楚了么？