Useful References

Apptainer Home Page at https://apptainer.org/ and the documentation at https://apptainer.org/docs

There are some good articles on other sites with help on using apptainer or singularity which are listed below. Note that some of these are written for Debian based distributions.

High-Performance Computing at the NIH: https://hpc.nih.gov/apps/singularity.html

A tutorial at Github, “Creating and running software containers with Singularity”:
https://github.com/NIH-HPC/Singularity-Tutorial

Singularity Python (https://singularityhub.github.io/singularity-cli/) is a Python API to work with singularities from your own Python scripts.

Singularity Registry Server at https://singularityhub.github.io/sregistry/ is an open source registry for Singularity containers.

This might be useful if you have dozens of Singularity containers and need a way to manage them. Singularity Global Client (https://singularityhub.github.io/sregistry-cli/) is a local client for the single user to manage images.