解决Centos6.5中ssh登录时Warning:Permanently added (RSA) to the list of known hosts的警告

当主机使用ssh免密码登录时，弹出Warning:Permanently added (RSA) to the list of known hosts的警告，看着很碍眼。通过以下方法进行解决：

1：vim  /etc/ssh/ssh_config（master和slave1都需要设置）

找到#StrictHostKeyChecking ask去掉注释，并把ask改为no即可