Quick notes. See other Ubuntu hints for more details. The following basic setup works to build Dakota on Ubuntu 20.04.1 LTS, starting from a minimal desktop installation

apt-get install gcc g++ gfortran cmake libboost-all-dev libblas-dev liblapack-dev\
libopenmpi-dev openmpi-bin gsl-bin libgsl-dev python perl libhdf5-dev

cmake -D CMAKE_INSTALL_PREFIX=/home/username/dakota -D CMAKE_C_FLAGS="-O2" -D CMAKE_CXX_FLAGS="-O2"  -D CMAKE_Fortran_FLAGS="-O2"\
-D DAKOTA_HAVE_GSL:BOOL=TRUE -D HAVE_QUESO:BOOL=TRUE -D DAKOTA_HAVE_MPI:BOOL=TRUE \
-D DAKOTA_HDF5:BOOL=TRUE -D Boost_NO_BOOST_CMAKE:BOOL=TRUE ../source

make

make install