方法一、

1.先去ssh删除里面全部

su - oracle

cd .ssh

2.配互信（node1，node2改成hostname）

node1:

[oracle @ node1~]$ ssh-keygen -t rsa //一路回车

[oracle @ node1~]$ ssh-keygen -t dsa

[oracle @ node1~]$ cd .ssh

[oracle @ node1.ssh]$ cat *.pub > authorized_keys

node2:

[oracle @ node2~]$ ssh-keygen -t rsa //一路回车

[oracle @ node2~]$ ssh-keygen -t dsa

node1:

[oracle @ node1 .ssh]$ scp authorized_keys node2:/home/oracle/.ssh/

//选yes 输入busrac2 oracle用户密码

node2:

[oracle @ node2~]$ cd .ssh

[oracle @ node2 .ssh]$ cat *.pub >> authorized_keys

[oracle @ node2 .ssh]$ scp authorized_keys node1:/home/oracle/.ssh/

3.验证等效性（必要的）

[oracle@node1 ~]$ ssh node1 date

[oracle@node1 ~]$ ssh node1-priv date

[oracle@node1 ~]$ ssh node1 date

[oracle@node1 ~]$ ssh node1-priv date

[oracle@node2 ~]$ ssh node2 date

[oracle@node2 ~]$ ssh node2-priv date

[oracle@node2 ~]$ ssh node2 date

[oracle@node2 ~]$ ssh node2-priv date

方法二、

到database下的sshsetup下找到sshUserSetup.sh

下方把hostname改正确

./sshUserSetup.sh -user grid -hosts "hostname1 hostname2" -advanced -noPromptPassphrase