Certification Information for Oracle Database on Linux x86-64 [ID 1304727.1] for more information.
The requirements for RHEL6 are given in the following metalink note
Requirements for Installing Oracle 11gR2 RDBMS on RHEL6 or OL6 64-bit (x86-64) [ID 1441282.1]
Oracle documentation has also been updated to reflect RHEL6 requirements. One minor adjustment is needed to run the 11.2.0.3 installer if not following pre-req failure will appear.
To remove this change the CV_ASSUME_DISTID entry in cvu_config file (located in database/stage/cvu/cv/admin) from
CV_ASSUME_DISTID=OEL4
to
CV_ASSUME_DISTID=OEL6
More information regarding this is available in
Installing 11.2.0.3 64-bit (x86-64) on RHEL6 Reports That Packages "elfutils-libelf-devel-0.97" and "pdksh-5.2.14" are missing (PRVF-7532) [ID 1454982.1]
Apart from this there is no other considerable difference when it comes to installing Oracle in RHEL 6 compared to other RHEL versions.
When it comes to asmlibs they will have to be downloaded from unbreakable linux site and will not be issued for kernels distributed by RedHat. More on this
Oracle ASMLib Software Update Policy for Red Hat Enterprise Linux Supported by Red Hat [ID 1089399.1]
Same goes for ocfs2 and REHL 6 as well.
Oracle Cluster File System (OCFS2) Software Support and Update Policy for Red Hat Enterprise Linux Supported by Red Hat [ID 1253272.1]
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