原文：http://yayaiu.blog.51cto.com/7801469/1707292

为了安全起见,服务器的ssh端口从默认的22修改为了22222

在安装RAC时,oracle用户间做了互信,但是并不能通过ssh直接连接,必须要加上-p 22222才能

这就会导致在安装crs时验证不通过,表现为:

Caught

Cluster ExceptionPRKC-1044 : Failed to check remote command execution

setup for node tgdb1 using shells /usr/bin/ssh and /usr/bin/rsh

tgdb1: Connection refused

[PRKC-1044 : Failed to check remote command execution setup for node tgdb1 using shells /usr/bin/ssh and /usr/bin/rsh

tgdb1: Connection refused]

[PRKC-1044 : Failed to check remote command execution setup for node tgdb1 using shells /usr/bin/ssh and /usr/bin/rsh

tgdb1: Connection refused

[PRKC-1044 : Failed to check remote command execution setup for node tgdb1 using shells /usr/bin/ssh and /usr/bin/rsh

tgdb1: Connection refused]]

看来oracle是直接调用的ssh命令,并不会加上-p 22222,这就导致了节点间不能通信的假象

解决办法:

修改/etc/service

把其中ssh   22222/tcp         # SSH Remote Login Protocol

的端口修改为22222解决