graceful-shutdown

For machines connected to UPS without ability to send shutdown signal.

This script shuts down the machine if no network is detected for x amount of time.

Set it up as a service

• Create a service file sudo nano /etc/systemd/system/gracefulShutdown.service Content:

  [Unit]
  Description=Graceful shutdown
  
  [Service]
  ExecStart=/PATH/TO/graceful-shutdown/gracefulShutdown.sh
  RuntimeDirectory=checkPowerSupply
  Restart=on-failure
  User=USER
  
  [Install]
  WantedBy=multi-user.target
  

• rename /PATH/TO the the location of shell script

• replace USER with actual user

• start and enable service sudo systemctl enable gracefulShutdown.service sudo systemctl start gracefulShutdown.service

Options

The script contains 2 important variables INTERFACE & MINUTES

INTERFACE (default eth0): the interface your device is connected with (see full list with ip link show)

MINUTES (default 10): the minutes the script waits until it sends the shutdown signal