In 1999, I had a big problem, when updating a package : the new version was not working ! So I had to "go back", but it was impossible to find the old rpm file (not on local disk, and not on the net). I just had it installed, on another host ...

I do not find any tool on the net, so I write a first release for this need, and I use it rarely.

But, in July 2002, I had a request from another Linux admin. As the script seems to match a more general need, I decide to put public on the net, as a project under the Gnu Public License.
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