> When configuring boot media, like an SD card, for an embedded ssystem that is not the running system where the configuration is occurring, this is an impedime

> When configuring boot media, like an SD card, for an embedded ssystem that is not the running system where the configuration is occurring, this is an impediment. There is systemd-firstboot, etc, but this is not as convenient as just being able to set config options on the mounted (non-booted) embeddded media. systemctl --root /path/to/sd/card/ <...>