linux - how to check if BLAS and ATLAS already installed -


i'm trying install armadillo library onto linux system(ubuntu 12.04). boost blas atlas , lapack required first installation. there way check if libraries installed or not?

all these libraries in default repository, can them 

sudo apt-get install liblapack3

etc. understand not quite answer question, have anyway. in case still want check if package (any, not libraries listed above) installed, run

apt-cache policy liblapack3

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