两个节点分别执行
1.su - grid
2.cd $HOME/.ssh
3.rm -rf *
4.图形化界面重新setup
5.test成功
参考链接：https://blog.csdn.net/tan88881111/article/details/80407620
参考文档：
Clean up the files in .ssh directory for grid user in VNC session:
cd $HOME/.ssh
rm -rf *
In the OUI session, click SSH "Setup" again to setup SSH for grid user from scratch,
then click "Test" in OUI,
Now it completes with "SSH for user grid has already been setup".Click "Next" in the OUI to complete the installation.
安装Oracle 19c RAC创建ssh连接成功，测试报错INS-06006
原文：https://www.cnblogs.com/peixk/p/13622399.html