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> This isn't a problem with Docker, which has tight control over what is deployed.

That contention is heavily dependent upon how Docker was installed. Docker desktop, yes. Command line Docker on Linux? That used to be much more complicated and depended on if you had an OS vendor provided version or had a Docker provided repo install.

RHEL’s repo version always seemed particularly out of date to me.

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Yeah, fortunately it's two lines of shell to add Docker's community repo to CentOS/Rocky Linux.

The latest version of podman is always available at https://copr.fedorainfracloud.org/coprs/rhcontainerbot/podma...

sudo dnf copr enable rhcontainerbot/podman-next -y

sudo dnf install podman

However the versions provided by the distro have gone through more tests. We are still improving this part as ideally you should be able to pick a version

Is it possible to run newer versions of podman and/or buildah as a container?

Yes. Podman in podman works, and this is how I sometimes tested on coreos without installing a new package. These days I mostly use a VM instead. Personal preference

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