Update Oracle Enterprise linux with the Oracle public Yum repositories
To make a successfull yum update, you must enable ALL versions in the .repo file in the /etc/yum.repos.d directory, otherwise, you’ll get “Dependency Missing” problems when updating.
It is not mandatory (I guess, have not tryed) but I whouldn’t recommend update straing from a low release (eg. 5.1) straight to another version. I consider it’s safer to update to the last update in the version before updating to the next version (but as I say, it’s just my opinion).
The Oracle public Yum repositories are available for download and instructions to use them at: http://public-yum.oracle.com/