# Apptainer/Singularity

Containers for shared and HPC systems with Apptainer (the Linux Foundation successor to Singularity, which keeps the `singularity` command) and Sylabs SingularityCE.

* [Introduction to Apptainer/Singularity](https://unm-carc.github.io/container-camp/singularity/intro/) - Install Apptainer or SingularityCE and use the CLI to pull, shell, exec, run, and inspect container images, including images from Docker Hub.
* [Building Apptainer/Singularity images](https://unm-carc.github.io/container-camp/singularity/advanced/) - Build SIF images from Docker images, sandboxes, and definition files, with the %post, %environment, %runscript, and %labels sections explained.
* [Apptainer/Singularity on HPC](https://unm-carc.github.io/container-camp/singularity/hpc/) - Run containers through a Slurm batch scheduler, match MPI versions between host and container, and use GPUs with the --nv flag.