选择安装server类型，选single，如果需要集群则安装另外一种
选择语种，
选择要安装的软件版本，这里我选择的是企业版，下一步
选择软件安装路径，之前在环境变量中已经设置过，这里软件自动检测到，默认即可，单击下一步
选择oracle所需用户组，自动检测到，默认即可。
然后软件安装程序开始检测硬件环境，所需软件包等配置是否正确，如下图：
检测结果如下图，物理内存和交换分区大小都达不到要求，我是在虚拟机中安装的，虽然内存设置的1G，实际上确实差了点，所以检测失败，不过这个不影响安装，勾选ignore all ，下一步即可
下面是配置总揽，如无错误，点击finish，开始安装。
快安装完毕会提示以root用户的身份执行两个脚本，orainstRoot.sh和root.sh。具体路径根据你开始设置的路径而定，安装程序会提示。下面是我安装过程中，执行脚本的过程：
[root@oraclehost database]#/u01/oraInventory/orainstRoot.sh
Changing permissions of /u01/oraInventory.
Adding read,write permissions for group.
Removing read,write,execute permissions forworld.
Changing groupname of /u01/oraInventory tooinstall.
The execution of the script is complete.
[root@oraclehost database]#/u01/app/oracle/root.sh
Running Oracle 11g root.sh script...
The following environment variables are setas:
ORACLE_OWNER= oracle
ORACLE_HOME= /u01/app/oracle
Enter the full pathname of the local bindirectory: [/usr/local/bin]:
Copying dbhome to /usr/local/bin ...
Copying oraenv to /usr/local/bin ...
Copying coraenv to /usr/local/bin ...
Creating /etc/oratab file...
Entries will be added to the /etc/oratabfile as needed by
Database Configuration Assistant when adatabase is created
Finished running generic part of root.sh script.
Now product-specific root actions will beperformed.
Finished product-specific root actions.
至此，oracle 11g安装完毕。