SingularityCE User Guide

Welcome to the SingularityCE User Guide!

This guide aims to give an introduction to SingularityCE, brief installation instructions, and cover topics relevant to users building and running containers.

For a detailed guide to installation and configuration, please see the separate Admin Guide for this version of SingularityCE at

Getting Started & Background Information

Building Containers

Learn how to write a definition file that can be used to build a container. Understand the environment within a build, how to perform remote builds, and how to use the --fakeroot feature to build as a non-root user.

Container Signing & Encryption

SingularityCE allows containers to be signed using a PGP key. The signature travels with the container image, allowing you to verify that the image is unmodified at any time. Encryption of containers using LUKS2 is also supported. Encrypted containers can be run without decrypting them to disk first.

Sharing & Online Services

Sylabs offers a suite of container services, with a free tier and on-premise options. Learn how to make use these services to simplify the process of building, signing, and sharing your containers.

Advanced Usage

Once you’ve understood the basics, explore all the options which SingularityCE provides for accessing data, running persistent services in containers, manipulating the container environment, and applying networking and security configuration.


SingularityCE has unique benefits and supports easy access to GPUs and other hardware. It also strives for compatibility with Docker/OCI container formats. Understand the differences between SingularityCE and Docker, as well as how to use containerized MPI and GPU applications.

Get Involved

We’d love you to get involved in the SingularityCE community! Whether through contributing feature and fixes, helping to answer questions from other users, or simply testing new releases.