安装 Oracle RAC 11gr2 时，SSH 连接测试失败，连接建立成功，但在测试阶段失败，这里有一些日志，
INFO: Environment Variables:
INFO: ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1
INFO: PATH = /usr/bin:/usr/ccs/bin:/u01/app/oracle/product/11.2.0/db_1/bin:/usr/sbin:/root/software/jdk1.7.0_60/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/home/oracle/bin:/home/oracle/software/grid/install
INFO: CLASSPATH =
INFO: Username:oracle
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INFO: /bin/rm /home/oracle/.ssh/id_rsa
INFO: Exit-status: 1
INFO: Error: /bin/rm: cannot remove `/home/oracle/.ssh/id_rsa': No such file or directory
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以上不是完整的日志，而是第一个错误发生的地方，我该如何解决这个问题？你的帮助将极大地帮助我。