SHELL

Modify an existing singularity container

sudo singularity build lolcow.sif docker://godlovedc/lolcow  # pulls and builds an example container

sudo singularity build --sandbox lolcow_sandbox/ lolcow.sif # converts from container to a writable sandbox

sudo singularity build lolcow2 lolcow_sandbox/ # converts from sandbox to container