ラズパイの右下のUSBになにか刺したらシャットダウンします〜

shutdown_by_usb.service

# /etc/systemd/system/shutdown_by_usb.service

[Unit]
Description=shutdown_by_usb

[Service]
Type=simple
ExecStart=bash -c 'while : ; do if [ -e /sys/bus/usb/devices/1-1.2 ] ; then echo "shutdown_by_usb!"; sleep 5; sudo shutdown -h now; sleep 60; else true; fi; sleep 1; $
Restart=always

[Install]
WantedBy=multi-user.target

## (osusume)
## sudo nano /boot/config.txt
## dtparam=pwr_led_trigger=heartbeat