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- sudo singularity build new.image.sif fermi-rhel6.singularity.def or
- sudo singularity build --sandbox new.image.dir fermi-rhel6.singularity.def # this is an "image" in a directory path that you can "cd" into and manually making changes.
The singularity definition file fermi-rhel6.singularity.def depends on docker rhel6 image, and SLAC's RHEL6 yum repo. Both could go away in the not too far future. When that happens, we will only be able to build new image from existing images. A definition file to do that looks like this;
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