how to check if BLAS and ATLAS already installed

Question

I'm trying to install armadillo library onto my linux system(ubuntu 12.04). The BOOST BLAS ATLAS and LAPACK is required first for the installation. Is there a way to check if those libraries are already installed or not?

Answer 1

All these libraries are in the default repository, so you can easily get them by

sudo apt-get install liblapack3

etc. I understand that this is not quite an answer to your question, but this is what you will probably have to do anyway. In case you still want to check if a package (any, not just libraries listed above) is installed, just run

apt-cache policy liblapack3