[$] Systemd improves image features and adds varlink API

Post Syndicated from jzb original https://lwn.net/Articles/1002398/

The systemd v257 release brings a number of incremental
enhancements to various components and utilities for working with
Linux systems. This includes more support for varlink, automated
downloading of disk images at boot time, and a number of improvements
to the secure-boot process for unified kernel images (UKIs), which we
have covered in a separate
article
.