This repository contains a snap package for iCloud Photo Downloader, a command-line tool to download photos from iCloud. It works on Ubuntu, Fedora, Debian, and other major Linux distributions.
The upstream documentation can be found here.
snap install icloudpd
sudo snap connect icloudpd:shmem
# Optionally connect the removable-media interface
sudo snap connect icloudpd:removable-media