升级database前全面检查：
列出要安装的软件：
选择Install开始安装。
安装过程如下：
在结束安装前，需要执行脚本： /oracle/product/RAC/root.sh
两台机器都执行,以hosta为例：
hosta# ./root.sh
Running Oracle 11g root.sh script...
The following environment variables are set as: ORACLE_OWNER= oracle
ORACLE_HOME= /oracle/product/RAC11g
Enter the full pathname of the local bin directory: [/usr/local/bin]:
The file \ Overwrite it? (y/n) [n]: y Copying dbhome to /usr/local/bin ...
The file \ Overwrite it? (y/n) [n]: y Copying oraenv to /usr/local/bin ...
The file \ Overwrite it? (y/n) [n]: y Copying coraenv to /usr/local/bin ...
Entries will be added to the /etc/oratab file as needed by Database Configuration Assistant when a database is created Finished running generic part of root.sh script.
Now product-specific root actions will be performed. chmod: can't access libocci.so
