cd $ORACLE_HOME/sshsetup
grid的话是GI_HOME(一个节点上跑即可)

./sshUserSetup.sh -user oracle -hosts "vma vmb" -advanced -noPromptPassphrase

集群（oracle,grid都要做）
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  输入二节点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/