Notify when a task is done http://unix.stackexchange.com/questions/153544/alert-when-running-process-finishes
sudo apt install beep
http://askubuntu.com/questions/409611/desktop-notification-when-long-running-commands-complete
Awesome
http://superuser.com/questions/31917/is-there-a-way-to-show-notification-from-bash-script-in-ubuntu
Notifications : echo 'message:hi' | zenity --notification --listen notify-send - https://ubuntuforums.org/showthread.php?t=1411620
http://askubuntu.com/questions/277215/make-a-sound-once-process-is-complete