DOT-Files/Gentoo/gentooamd/home/user/.tldrc/tldr/pages/linux/apptainer-overlay.md

apptainer overlay

Manage EXT3 writable overlay images for Apptainer containers. More information: https://apptainer.org/docs/user/main/cli/apptainer_overlay.html.

• Add a writable overlay to an existing SIF image:

apptainer overlay create {{[-s|--size]}} {{size}} {{path/to/image.sif}}

• Create a standalone EXT3 writable overlay image:

apptainer overlay create {{[-s|--size]}} {{size}} {{path/to/overlay.img}}

• Create a sparse overlay image:

apptainer overlay create {{[-s|--size]}} {{size}} {{[-S|--sparse]}} {{path/to/overlay.img}}

• Create an overlay for use with fakeroot:

apptainer overlay create {{[-f|--fakeroot]}} {{[-s|--size]}} {{size}} {{path/to/overlay.img}}

• Create an overlay with a specific directory in the layout:

apptainer overlay create --create-dir {{path/to/directory}} {{path/to/overlay.img}}

• Display help:

apptainer overlay {{[-h|--help]}}