Install gntp-send by entering the following commands in the terminal:
sudo apt update sudo apt install gntp-send
Description:
Command line application to send growl message with GNTP
Growl is a notification system for Mac OS X. It uses GNTP (Growl Notification Transport Protocol) for notification. . gntp-send is a command line tool which supports GNTP.
Homepage: https://github.com/mattn/gntp-send
Version: 0.3.4-1
Section: universe/net