ssh 远程登陆错：
[root@had-0 pam.d]# ssh had-0
No RSA host key is known for had-0 and you have requested strict checking.
Host key verification failed.
解决：
从其他地方拷个known_hosts到.ssh下
No RSA host key is known for had-0 and you have requested strict checking.
原文：http://dihuo.blog.51cto.com/1657091/1579204