dnd control macOS notification "Do Not Disturb" settings from the command line.
DND uses AppleScript to control System Events. For this to work, your terminal application must be allowed to "control your computer" via Accessibility preferences configured in the "Privacy" tab of the System Preferences.
Download the dnd script and make it available in your PATH.
curl -o /usr/local/bin/dnd -O https://raw.githubusercontent.com/joeyhoer/dnd/master/dnd.sh && \
chmod +x /usr/local/bin/dnd
# Enable Do Not Disturb
dnd on