After upgrade to Ubuntu 20.04 cannot install lapack, blas, openmpi with apt.
In earlier Ubuntu versions, procedure was simple:
apt -y install gfortran
apt -y install build-essential liblapack* libblas*
apt -y install openmpi* libopenmpi*
Doing this in 20.04 only gfortran ended successfully. Let me remind you Sheldon Cooper's "Oh Ubuntu! you are my favorite Linux-based operating system". So don't lose your reputation among nerds.