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This fails:

sudo apt-get -t=2.3.1 install libopencv

Is there a way to figure put which command I have to type to get 2.3.1 running?

The default on Ubuntu 13.04 is 2.4


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up vote 0 down vote accepted

Download the DEB installer file for version 2.3 and install it manually. Or through Ubuntu software center even (by doubleclicking the DEB).

2.3 can be found here: (debian) or from the official website: (sources).

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