On 1/6/21 8:01 PM, Strahil Nikolov via CentOS wrote: > - No chance to "yum history undo last" as there are no older packages I've seen that mentioned as a change pretty frequently, but I don't think it is in any meaningful sense. In CentOS Stream, package versions may be rebased periodically, and the public repos will no longer have older packages to install when using "undo" or "rollback". In CentOS, package versions may be rebased at minor releases, and the public repos will no longer have older packages to install when using "undo" or "rollback". It's true that you might be able to roll back a simple patch in CentOS in between minor releases, but those are the updates that everyone seems to regard as being the safest, and least likely to cause problems, and therefore the least likely to need undo/rollback. The only rational conclusion I can come to is that it doesn't matter if you're talking about CentOS today or Stream in the future: If you want to be able to roll back, you need a private mirror that keeps the package versions that you use. If you don't want a mirror, then you need to build, test, and deploy complete images rather than making incremental changes to mutable systems. None of this is new, it's always been this way and people have just accepted it.