systemd-loop@.service — Attach a loopback block device
systemd-loop@path.service
systemd-loop@.service is a template service that may be used to automatically
attach a loopback block device at boot (or later). Its instance string may reference an (escaped) file
system path pointing to a disk image to attach as loopback block device. Use
systemd-escape(1)'s
--path to properly escape a file system path.
This unit invokes systemd-dissect --attach --quiet --loop-ref-auto on the specified files, see systemd-dissect(1) for details.