Use the --notification option.
Notification Icon
Use the --notification option to create a notification icon.
-
--text=text
Specifies the text that is displayed in the notification area.
-
--listen=icon: 'text', message: 'text', tooltip: 'text', visible: 'text',
Listens for commands at standard input. At least one command must be specified. Commands are comma separated. A command must be followed by a colon and a value.
The icon command also accepts four stock icon values such as error, info, question and warning.
The following example script shows how to create a notification icon:
#!/bin/sh
zenity --notification\
--window-icon="info" \
--text="There are system updates necessary!"
Notification Icon Example
Zenity notification icon example
The following example script shows how to create a notification icon along with --listen:
#!/bin/sh
cat <<EOH| zenity --notification --listen
message: this is the message text
EOH
Notification Icon with --listen Example
Zenity notification with --listen example