文档课题：Linux服务器互信配置.
配置ssh用户等效性
[root@rac3 tmp]# su - grid
[grid@rac3 ~]$ mkdir ~/.ssh
[grid@rac3 ~]$ chmod 700 ~/.ssh

--使用如下命令生成用户身份认证秘钥
[grid@rac3 ~]$ ssh-keygen -t rsa
--一路回车

[grid@rac3 ~]$ ssh-keygen -t dsa
--一路回车

节点1：
[grid@rac1 ~]$ ssh rac3 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
[grid@rac1 ~]$ scp ~/.ssh/authorized_keys rac3:~/.ssh/

节点2：
[grid@rac2 .ssh]$ ssh rac3 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

测试
节点3:
[grid@rac3 .ssh]$ ssh rac1 date
[grid@rac3 ~]$ ssh rac1-priv date
[grid@rac3 .ssh]$ ssh rac2 date
[grid@rac3 ~]$ ssh rac2-priv date

节点1：
[grid@rac1 ~]$ ssh rac3 date
[grid@rac1 ~]$ ssh rac3-priv date

节点2：
[grid@rac2 ~]$ ssh rac3 date
[grid@rac2 ~]$ ssh rac3-priv date

#需要达到不输入yes

配置ssh用户等效性
[root@rac3 tmp]# su - oracle
[oracle@rac3 ~]$ mkdir ~/.ssh
[oracle@rac3 ~]$ chmod 700 ~/.ssh

--使用如下命令生成用户身份认证秘钥
[oracle@rac3 ~]$ ssh-keygen -t rsa
--一路回车

[oracle@rac3 ~]$ ssh-keygen -t dsa
--一路回车

节点1：
[oracle@rac1 ~]$ ssh rac3 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
[oracle@rac1 ~]$ scp ~/.ssh/authorized_keys rac3:~/.ssh/

节点2：
[oracle@rac2 ~]$ ssh rac3 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

测试
节点3:
[oracle@rac3 ~]$  ssh rac1 date
[oracle@rac3 .ssh]$ ssh rac1-priv date
[oracle@rac3 ~]$  ssh rac2 date
[oracle@rac3 .ssh]$ ssh rac2-priv date

节点1：
[oracle@rac1 ~]$ ssh rac3 date
[oracle@rac1 ~]$ ssh rac3-priv date

节点2：
[oracle@rac2 ~]$ ssh rac3 date
[oracle@rac2 ~]$ ssh rac3-priv date

#需要达到不输入yes