Alerting the user

It's nice to have your computer beep when an important task has completed and you want to know about it right away. Here's a script I use to beep the internal speaker on my computer:

Chapter 10 – Script 3

#!/bin/sh
#
# 5/3/2017
#
# beep the PC speaker

lsmod | grep pcspkr > /dev/null
rc=$?
if [ $rc -ne 0 ] ; then
 echo "Please modprobe pcspkr and try again."
 exit 255
fi

echo -e '\a' > /dev/console

This command will beep the PC speaker if it has one and if the driver has been loaded. Note that this command will probably only work on your system when run as the root user.