Script for turning on and off a connected screen, on a Raspberry Pi

screenctl

#!/bin/bash

## script for turning and off the connected screen
## taken from https://www.raspberrypi.org/forums/viewtopic.php?t=7570

if [ $1 = 'on' ]; then
  tvservice -p
  fbset -depth 8
  fbset -depth 16
  fbset -depth 32
  chvt 6
  chvt 7
  # added to deal with desktop not redrawing
  export DISPLAY=:0
  xrefresh
  echo 'Switched Screen ON!'
fi

if [ $1 = 'off' ]; then
  tvservice -o
  echo 'Switched Screen OFF!'
fi