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This question already has an answer here:

How can I determine which repository is being used for an installed packages? I have a few custom PPA repositories, and I'm concerned on one system whether the installed package is from one PPA or the other.

Thank you.

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marked as duplicate by bodhi.zazen, belacqua, Radu Rădeanu, Warren Hill, Eric Carvalho Jul 11 '13 at 11:02

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

If you install synaptic (sudo apt-get install synaptic), you can use it to view the sources of packages:


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