Script to detect activity on the computer (keyboard/mouse)

activity-logger.sh

#!/bin/bash

state="active"
threshold=10000

while true; do
  sleep 1  
  idle=$(xprintidle)
  if [[ "$idle" -lt "$threshold" && "$state" != "active" ]] ; then
    state="active"
    echo "$(date) - new activity started"
    continue
  fi

  if [[ "$idle" -ge "$threshold" && "$state" == "active" ]]; then
    state="inactive"
    echo "$(date) - stopped activity"
  fi
done