Display a Window with custom text

Russ

This command will show a window with the text you want to show:

zenity --info --text '<span foreground="blue" font="32">Some\nbig text</span>\n\n<i>(it is also blue)</i>'

zenity

If you run it in the background agent, have your command run this script to set the DISPLAY environment variable first:

#!/bin/bash
export DISPLAY=:0
zenity --info --text '<span foreground="blue" font="32">Some\nbig text</span>\n\n<i>(it is also blue)</i>'

You'll also need to run this as your normal user first:

xhost +