Linuxでのssh接続がIPアドレスならできるのにホスト名だとできない上にも書いてますが、IPアドレスでssh接続できるのに、ホスト名になると-----------------------------------------------------------------------------『WARNING : POSSIBLE DNS SOOFING DETECTED!』The RSA host key for 【ホスト名】 has changed,and the key for the corresponding IP address 【目的のPCのIPアドレス】 is unchenged. This could either mean that DNS SPOOFING is happening or the IP address for the host and its host key have chenged at the same time.offending key for IP in /home/******/.ssh/known_hosts:10『WARNING : REMOTE HOST IDENTIFICATION HAS CHANGED!』IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!Someone could be eavesdropping on you right now ( mean-in-the-middle attack)!It is also possible that the RSA host key has just been chenged.The fingerprint for the RSA key sent by the remote host is d〇: a〇:d〇:○○・・・・・・・・・Please contact your system administrator.Add correct host key /home/******/.ssh/known_hosts to get rid of this message.Offending key in /home/******/.ssh/known_hosts:2RSA host key for 【ホスト名】has changed and you have requested strict checking.Host key verification failed.----------------------------------------------------------------------------といったメッセージが出てしまいます。この後$ssh-keygen -R 172.***.***.***（←目的のPCのIPアドレス）を流してみるのですが、相変わらずIPアドレスでしか繋がりません。ちなみに他のもいくつかPCはあるのですが、そちらからはホスト名で繋がります。どうすればいいか教えてください。ちなみにDNSサーバーの方の確認はしています。