oracle  11g 安装包中找到sshUserSetup.sh脚步，在一个节点分别执行如下步骤即可:

su - oracle

./sshUserSetup.sh -user oracle -hosts "racnode1 racnode1" -advanced -noPromptPassphrase

su - grid

./sshUserSetup.sh -user grid -hosts "racnode1 racnode2" -advanced -noPromptPassphrase

oracle 11g rac 安装时oracle、grid 账号ssh互信设置