Zenity

wikipedia:Zenity

apt install zenity

zenity --info --text "hello world"

zenity --info --text "hello world"
Unable to init server: Could not connect: Connection refused

(zenity:2406): Gtk-WARNING **: 13:16:32.724: cannot open display:

Related

• tput bel

See also

• Zenity
• ncurses, zenity
• Sound notifications: tput bel, paplay, echo -e '\a', printf '\7', osascript -e 'beep 1', afplay, ping -a, say, ntfy.sh, bip (alias)