Backup and restore interfaces file and reboot system if not canceled.

keepmyjob.sh

#!/usr/bin/env bash
# Noah Bliss
# GPLv3 License
# Backup and restore interfaces file and reboot system if not canceled. 
# This program will hang the terminal. I prefer it that way and use tmux in a split window. 
file="/etc/network/interfaces"
backup="/etc/network/interfaces.safe"
echo "Backing up $file to $backup"
if ! cp "$file" "$backup"; then echo "Failed to backup"; exit 1; fi
# If we have inotifywait, use it. 
if command -v inotifywait >/dev/null; then
        echo "Using inotifywait to monitor file for changes..."
        inotifywait -e modify "$file"
        date=$(date)
        echo "Now is $date"
        echo "Sleeping for 2 minutes. I will restore the backup file and reboot the system if I am not canceled."
        sleep 1m
        echo "One minute left."
        sleep 30
        echo "30 seconds left."
        sleep 20
        echo "10 seconds left."
        sleep 10
else
        date=$(date)
        echo "Now is $date"
        echo "Sleeping for 5 minutes. I will restore the .safe file and reboot the system if I am not canceled."
        sleep 4m
        echo "One minute left."
        sleep 30
        echo "30 seconds left."
        sleep 20
        echo "10 seconds left."
        sleep 10
fi
cp "$backup" "$file"
reboot