seeing as Oracles linux is a rebuild of RHEL and is explicitly set up and optimized to run Oracles 12 g DataBase
you might be better off installing the FREE rebuild of the current RHEL 6.4
it comes with MySQL installed and not the "not really free" Oracle 12 DB
now if you MUST 100% must use Oracles rebuild , then install the current 6.4 ( the dvd 1 is all 99.999% of people need )
"Oracle Linux Release 6 Update 4 for x86_64 (64 Bit) V37084-01 3.5G "
then BUY ( yes for $$$$$$$ ) the support contract