I was following a RHEL solution about the downgrade, which went as follows:
- Check version and releases
search for the available packages
yum list kernel-2.6.32-358*
- Install the rhel 6.4 kernel package yum install kernel-2.6.32-358.23.2.el6 .... Complete !
- Reboot system
yum clean metadata yum clean all
yum -y downgrade redhat-release
I get the following error Downloading Packages: https://cdn.redhat.com/content/dist/rhel/server/6/6Server/x86_64/os/Packages/redhat-release-server-6Server-220.127.116.11.el6.x86_64.rpm: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404 Not Found" Trying other mirror.
The current 6.5 is clean install not upgrade and I was not able to find a way to configure 6.4 repositories ... Also the changes in any of the grub files : /boot/efi/EFI/redhat/grub.conf /etc/grub.conf /etc/grub.conf.rpmsave
and reboot according to this instruction do to cause the server to boot into 6.4 's kernel ... and it did not work neither ...
Search for loading of the kernel without reboot , yet it seemed too risky ... This hack gave just before the latest command EFI related errors , so did not apply it ( do not want to go to the data center ... yet ... )
So after some 5 hours of googling the following questions arose: When one buys RHEL 6.5 subscriptions is it the case that downgrade is not even possible or Is it possible, but first RHEL 6.4 repos must be configured ( how ?! Should RH Customer Support be contactd ?! )
and am I completely lost about some fundamentally basic link missing to resolve this issue ?!
Thanks in advance !!!