##node1
# su - oracle
node1->mkdir ~/.ssh
node1-> chmod 700 ~/.ssh

node1->ssh-keygen -t rsa ##一路回车
Generating public/private rsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_rsa.
Your public key has been saved in /home/oracle/.ssh/id_rsa.pub.
The key fingerprint is:
1f:a5:6f:8b:c9:e9:a3:04:4d:99:27:6a:3d:77:4d:1e oracle@node1.localdomain

node1->ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_dsa.
Your public key has been saved in /home/oracle/.ssh/id_dsa.pub.
The key fingerprint is:
fc:83:1c:73:37:52:50:90:50:aa:8b:41:9f:61:b9:6b oracle@node1.localdomain

##node2
# su - oracle
node2->mkdir ~/.ssh
node2->chmod 700 ~/.ssh

node2->ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_rsa.
Your public key has been saved in /home/oracle/.ssh/id_rsa.pub.
The key fingerprint is:
e9:fd:b0:9b:1e:57:56:07:51:9c:2e:99:33:dc:0d:03 oracle@node2.localdomain

node2->ssh-keygen -t dsa
Generating public/private dsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_dsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/oracle/.ssh/id_dsa.
Your public key has been saved in /home/oracle/.ssh/id_dsa.pub.
The key fingerprint is:
67:f7:9a:09:e1:9e:c2:4f:6b:9a:e3:71:ce:c4:eb:08 oracle@node2.localdomain

##回到node1
node1->cd ~
node1->ll -a
node1->cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
node1->cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

node1->ssh node2 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
The authenticity of host 'node2 (192.168.0.4)' can't be established.
RSA key fingerprint is 36:5f:59:0d:52:d3:24:68:7d:60:59:da:10:37:b1:47.
Are you sure you want to continue connecting (yes/no) yes
Warning: Permanently added 'node2,192.168.0.4' (RSA) to the list of known hosts.
oracle@node2's password:

node1->ssh node2 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
oracle@node2's password:
*****把公钥文件拷贝到node2
node1->scp ~/.ssh/authorized_keys node2:~/.ssh/authorized_keys
oracle@node2's password:
authorized_keys 100% 2040 2.0KB/s 00:00

##验证oracle用户对等性
每个节点执行如下命令，第二次执行时不再需要输入口令
ssh node1 date
ssh node2 date
ssh node1-priv date
ssh node2-priv date
ssh node1.localdomain date
ssh node2.localdomain date
ssh node1-priv.localdomain date
ssh node2-priv.localdomain date

根据以上方法，grid用户配置对等性

1.4、配置共享磁盘