Instal Oracle XE 11g R2 on Linux

Before attempting to install Oracle Database XE 11.2 uninstall any existing Oracle Database XE or database with the SID XE from the target system.
To install Oracle Database XE:

1. Log on to your computer with root permissions.
   
2. Go to the following Web site:
   http://www.oracle.com/technetwork/database/express-edition/downloads/index.html
   
3. Click Free Download and follow the instructions to select and download the Linux version of Oracle Database XE.
   
4. Run the Oracle Database XE executable oracle-xe-11.2.0-1.0.x86_64.rpm to install Oracle Database XE.
   

   # rpm -ivh downloads/oracle-xe-11.2.0-1.0.x86_64.rpm
   

   The installation displays a status of its progress.
   
5. When prompted, run the following command:
   

   # /etc/init.d/oracle-xe configure
   

6. Enter the following configuration information:
   
   • A valid HTTP port for the Oracle Application Express (the default is 8080)
     
   • A valid port for the Oracle database listener (the default is 1521)
     
   • A password for the SYS and SYSTEM administrative user accounts
     
   • Confirm password for SYS and SYSTEM administrative user accounts
     
   • Whether you want the database to start automatically when the computer starts (next reboot)
     

This completes configuration. The database starts during the boot process.
To start the database manually, run this command as root user:

# /etc/init.d/oracle-xe start

To stop the database manually, run the following command as root user:

# /etc/init.d/oracle-xe stop