See https://www10.informatik.uni-erlangen.de/Cluster/
<source lang="bash">
# See avail
module avail
# Show what loading does
module show openmpi-x86_64
# See if anything is loaded
module list
# Load
module load openmpi-x86_64
module list
# Unload
module unload openmpi-x86_64
</source>