To reduce complexity on Oracle Linux 7 systems, you can use the oracle-rdbms-server-11gR2-preinstall package from the Oracle yum repository, which automatically configures these prerequisites. Alternatively, you can manually add these configurations to /etc/sysctl.conf and then run /sbin/sysctl -p to apply them.
Step-by-Step: How to Download 11.2.0.4 from My Oracle Support oracle database 11g release 2 11.2 0.4 download
What (and specific version) are you installing this on? To reduce complexity on Oracle Linux 7 systems,
Add the files to your cart and checkout to begin the download. oracle database 11g release 2 11.2 0.4 download

To reduce complexity on Oracle Linux 7 systems, you can use the oracle-rdbms-server-11gR2-preinstall package from the Oracle yum repository, which automatically configures these prerequisites. Alternatively, you can manually add these configurations to /etc/sysctl.conf and then run /sbin/sysctl -p to apply them.
Step-by-Step: How to Download 11.2.0.4 from My Oracle Support
What (and specific version) are you installing this on?
Add the files to your cart and checkout to begin the download.