Is there a way to find which PPA supplied a given package?

Asked by James Lewis

I have a machine which uses a number of PPA's some of which supply updated versions of the same packages... I want to purge the PPA which provides a particular package I have a problem with to exclude it as a possible source of the problem, but I cannot find a way to see which PPA is providing a package... I can see that several versions of the package are available within synaptic, but it does not show which PPA supplies each one.

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Michael Basse (michael-alpha-unix) said :
#1

"apt-cache policy packagename" will show you from which repo the package is installed and which repos are also holding the package in the same or another version

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