Install oracle 11g R2 on CentOS 5.8

1. Find the oracle Installation Package and unzip it to the database directory./runInstaller www.2cto.com
 
Do not fill in the oracle support account, and then select "do not receive" in the pop-up window, Continue www.2cto.com
Select to only install the oracle software, next select a single instance to install, and next click www.2cto.com
Select the language. Here I only select English and simplified Chinese. The Enterprise Edition is selected by default next. The environment variables of oracle users, ORACLE_BASE and ORACLE_HOME, will be automatically loaded next. if you have read the parameter settings, you will find that ORACLE_HOME is not in the profile. The reason is that I typed ORACLE_HOME incorrectly (written as ORACHE_HOME). In my bad, next step, oracle will check the system software environment and list the non-conforming items. My VM memory here is a little small. I searched the internet and increased the SWAP space. uninstalled packages were also installed through yum and re-checked. All of them successfully provided the previous steps, click Next to start installing the oracle instance. Wait for a while and run the two scripts with the root account! Next, execute the netca configuration listener. Here, the oracle user executes the netca command and the prompt "command not found" is displayed. The cause is very simple. The ORACLE_HOME environment variable is set incorrectly. Modify it and make it take effect.
Netca configuration listening. Keep the default value for all requests. Just click Next. Dbca is also the next step to create a database. In the test environment, you can check the installation script HR and OE www.2cto.com.

Source http://www.cnblogs.com/xyhui/archive/2012/10/17/centos-oracle-install.html