[root@master ~]# ssh slave2 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: POSSIBLE DNS SPOOFING DETECTED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ The RSA host key for slave2 has changed,and the key for the corresponding IP address 192.168.1.118 is unknown. This could either mean that DNS SPOOFING is happening or the IP address for the host and its host key have changed at the same time. @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that the RSA host key has just been changed. The fingerprint for the RSA key sent by the remote host is 06:1d:d3:b7:90:69:3e:46:7f:6d:0f:0c:03:a5:07:e9. Please contact your system administrator. Add correct host key in /root/.ssh/known_hosts to get rid of this message. Offending key in /root/.ssh/known_hosts:5 RSA host key for slave2 has changed and you have requested strict checking. Host key verification Failed.
我用vmware复制了一台主机增加到hadoop节点，ssh连接时提示错误；
终极解决办法：
1. 删除master主机的/root/.ssh/下的文件；
2. 重新生成ssh-keygen，然后再scp到其他的服务器上即可
命令如下：
$ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa $ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys 然后，将authorized_keys复制到slave1,slave2 scp ~/.ssh/authorized_keys slave1:~/.ssh/ scp ~/.ssh/authorized_keys slave2:~/.ssh/
