问题 [roothadoop1 sbin]# ssh-copy-id hadoop1 /usr/bin/ssh-copy-id: ERROR: failed to open ID file '/root/.pub': 没有那个文件或目录 (to install the contents of '/root/.pub' anyway, look at the -f option) 解决方法 [roothadoop1 sbin]# ssh-keygen -t dsa Generating pub