Package and Driver Changes
The list of included packages and system drivers undergoes regular changes in Red Hat Enterprise Linux releases. This is done for a number of reasons: packages and drivers are added or updated in the operating system to provide new functionality, or the packages and drivers may represent out-of-date hardware and are removed. The upstream project for the packages and drivers might no longer be maintained, or hardware-specific packages and drivers are no longer supported by a hardware vendor and are removed.
The Migration Planning Guide
documents major differences between Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6, including the packages and drivers that are either new, updated, deprecated or discontinued.
The following list is all the Packages that were shipped in Red Hat Enterprise Linux 5 but are not in Red Hat Enterprise Linux 6. Note that many of these packages have been replaced with newer equivalents.