Use the --notification option.

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# Notification Icon

Use the --notification option to create a passive desktop notification.

# --text=text

Specifies the text that is displayed in the notification area.

# --icon=path

Set the notification icon using a string containing a path to a valid icon on the system.

# --listen

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 icon theme name values in accordance with the FreeDesktop.org Icon Naming Specification such as dialog-error, dialog-information and security-high.

Examples include:

message: Hello, my name is Joe icon: /usr/share/pixmaps/monitor.xpm

The following example script shows how to create a notification icon:

#!/bin/sh

zenity --notification \ --icon="/usr/share/pixmaps/monitor.xpm" \ --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