On Thu, Jan 6, 2011 at 6:10 AM, Tomas Hoger <[email protected]> wrote:

>
> > Another report I made which may or may not be useful to the security
> > team is a list of packages between Debian and Fedora that are roughly
> > equivalent, irrespective of what the package names are
> >
> https://github.com/silviocesare/Equivalent-Packages/blob/master/NearestNeighbour/Debian5_Fedora13_Matches
>
> Out of curiosity, how should Similarity number be interpreted?
>
>
I compare the contents of source packages between distributions. The more
similar the source packages the higher the similarity. If the sources are
identical, then the similarity is 1, if they are completely unrelated the
similarity is 0.

This is how equivalent packages can be determined irrespective of the
package names - based on similarity between their sources. A threshold is
set to say if two packages are equivalent based on their similarity.

I added some more content yesterdyay in the git repo to show similarity
between packages within a distribution. This could be useful to find
otherwise duplicated sources - a seperate source package could be created
that is made common to the two highly similar packages. I haven't really
gone down that track before, so take it for what you may..

--
> Tomas Hoger / Red Hat Security Response Team
>

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Silvio
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