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I used the RHN - red-hat satellite version 5.x in order to install errata patch: ( on linux version 6.x )

glibc-2.12-1.166.el6_7.7.x86_64

while the curent patch on my linux was

glibc-devel-2.12-1.166.el6_7.3.x86_64

so after RHN installation the patch installed successfully

but I want now to return to the previous patch version -

 glibc-devel-2.12-1.166.el6_7.3.x86_64

How RHN can do the fallback process?

what are the steps that ended from RHN in order to perform the fallback?

. . .

from my linux machine:

# yum history info | tail -5
    Updated glibc-devel-2.12-1.166.el6_7.3.x86_64   @rhel-x86_64-server-6
    Update              2.12-1.166.el6_7.7.x86_64   @rhel-x86_64-server-6
    Updated glibc-headers-2.12-1.166.el6_7.3.x86_64 @rhel-x86_64-server-6
    Update                2.12-1.166.el6_7.7.x86_64 @rhel-x86_64-server-6
    history info
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You can go to:

System Detail -> Packages -> Compare Package Profiles / Manage Package Profiles

Here you can compare to another profile. Ideally to profile of the same system before you done the upgrade. But you can compare against some other machine too. You can then sync to selected profiles, which can do the downgrade (and removal/installation too). You need Provision entitlement to do so.

Profiles can be created in:

System Detail -> Packages -> Profiles

yum downgrade from command line should work too as those old version of packages are present in the channel as well.

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