/etc/init.d/qemu-guest-agent status
* qemu-guest-agent.service - QEMU Guest Agent
     Loaded: loaded (/lib/systemd/system/qemu-guest-agent.service; static; vendor preset: enabled)
     Active: inactive (dead)

Jun 20 23:10:10 nas systemd[1]: Dependency failed for QEMU Guest Agent.
Jun 20 23:10:10 nas systemd[1]: qemu-guest-agent.service: Job qemu-guest-agent.service/start failed with result 'dependency'.