Fedora - how to downgrade to a specific package version?

Question

How to downgrade to a specific package version not available with plain dnf downgrade <package>?

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For example, the Linux kernel my Fedora 23 came out with (kernel-4.6.4-201.fc23.i686) must be downgraded to a specific version 4.4.9, for some project-specific reason.

How can I downgrade (using dnf) the kernel package to kernel-4.4.9-300.fc23.i686?

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The problem is this command:

$ dnf downgrade kernel

only proposes to install kernel version kernel-4.2.3-201.fc23.i686, which is not the version I want.

The packages I need can be found for example on the koji website:

http://koji.fedoraproject.org/koji/buildinfo?buildID=760145

but I don't know how to request a dnf install from there.

How can I do that?

Answer 1

Just apply dnf downgrade to RPMs that you downloaded yourself.

In your example, in case of the kernel packages, download the RPMs you want from Koji and install them using dnf downgrade:

cd /tmp/
mkdir kernel/
cd kernel/
wget https://kojipkgs.fedoraproject.org//packages/kernel/4.4.9/300.fc23/i686/kernel-4.4.9-300.fc23.i686.rpm
[... and the other packages you need to downgrade ...]
dnf downgrade *.rpm

Not all package versions are available in the mirrors.