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E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
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marked as duplicate by Eric Carvalho, Kevin Bowen, Radu Rădeanu, Raja, Jorge Castro Jul 6 '13 at 14:34

This question was marked as an exact duplicate of an existing question.

This means that some updating software is already running. If you are using the terminal to do sudo apt-get update and sudo apt-upgrade be sure that the Software Center and Synaptic are closed.

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