Don't disturb: How to temporarily mute notifications on Ubuntu 16.04
Channel: Freedom meets Awareness
Date: 2016-07-23

sudo apt-add-repository  ppa:vlijm/nonotifs
sudo apt-get update
sudo apt-get install nonotifs

https://askubuntu.com/questions/769948/is-there-a-dont-disturb-option-to-temporarily-hide-notifications-like-on-mac/769978#769978