[Unit]
Description=Set hostname to OpenVoiceOS-[MAC]
Before=NetworkManager.service
Before=avahi-daemon.service

[Service]
Type=oneshot
ExecStart=/bin/sh -c "hostnamectl set-hostname OpenVoiceOS-`sed 's/://g' /sys/class/net/eth0/address | tail -c 7`"

[Install]
WantedBy=multi-user.target