3.1.1. apptainer build

Note

recommended to build on local machine --fakeroot or sudo SIF files are only readable, no write.

# from docker
sudo apptainer build SIF docker://ubuntu:22.04

# definition file requires sudo
sudo apptainer build SIF DEF

# writable directory for testing
sudo apptainer build --sandbox /tmp/dir docker://ubuntu:22.04
sudo apptainer build --sandbox /tmp/dir SIF