命令notify-send手册上说
Usage:
notify-send [OPTION...] <SUMMARY> [BODY] - create a notification
Help Options:
-?, --help Show help options
Application Options:
-u, --urgency=LEVEL Specifies the urgency level (low, normal, critical).
-t, --expire-time=TIME Specifies the timeout in milliseconds at which to expire the notification.
-i, --icon=ICON[,ICON...] Specifies an icon filename or stock icon to display.
-c, --category=TYPE[,TYPE...] Specifies the notification category.
-h, --hint=TYPE:NAME:VALUE Specifies basic extra data to pass. Valid types are int, double, string and byte.
-v, --version Version of the package.
最后 3 个参数的含义：category、hint和version我不清楚。
答案1
（在Debian manpageGNU/Linux 中）建议查看http://www.galago-project.org/specs/notification/。
从修订版 0.9 开始。
类别
+------------------------------------------------------------------------+
| Type | Description |
|------------------------+-----------------------------------------------|
| "device" | A generic device-related notification that |
| | doesn't fit into any other category. |
|------------------------+-----------------------------------------------|
| "device.added" | A device, such as a USB device, was added to |
| | the system. |
|------------------------+-----------------------------------------------|
| "device.error" | A device had some kind of error. |
|------------------------+-----------------------------------------------|
| "device.removed" | A device, such as a USB device, was removed |
| | from the system. |
|------------------------+-----------------------------------------------|
| "email" | A generic e-mail-related notification that |
| | doesn't fit into any other category. |
|------------------------+-----------------------------------------------|
| "email.arrived" | A new e-mail notification. |
|------------------------+-----------------------------------------------|
| "email.bounced" | A notification stating that an e-mail has |
| | bounced. |
|------------------------+-----------------------------------------------|
| | A generic instant message-related |
| "im" | notification that doesn't fit into any other |
| | category. |
|------------------------+-----------------------------------------------|
| "im.error" | An instant message error notification. |
|------------------------+-----------------------------------------------|
| "im.received" | A received instant message notification. |
|------------------------+-----------------------------------------------|
| "network" | A generic network notification that doesn't |
| | fit into any other category. |
|------------------------+-----------------------------------------------|
| | A network connection notification, such as |
| "network.connected" | successful sign-on to a network service. This |
| | should not be confused with device.added for |
| | new network devices. |
|------------------------+-----------------------------------------------|
| | A network disconnected notification. This |
| "network.disconnected" | should not be confused with device.removed |
| | for disconnected network devices. |
|------------------------+-----------------------------------------------|
| "network.error" | A network-related or connection-related |
| | error. |
|------------------------+-----------------------------------------------|
| | A generic presence change notification that |
| "presence" | doesn't fit into any other category, such as |
| | going away or idle. |
|------------------------+-----------------------------------------------|
| "presence.offline" | An offline presence change notification. |
|------------------------+-----------------------------------------------|
| "presence.online" | An online presence change notification. |
|------------------------+-----------------------------------------------|
| | A generic file transfer or download |
| "transfer" | notification that doesn't fit into any other |
| | category. |
|------------------------+-----------------------------------------------|
| "transfer.complete" | A file transfer or download complete |
| | notification. |
|------------------------+-----------------------------------------------|
| "transfer.error" | A file transfer or download error. |
+------------------------------------------------------------------------+
标准提示
+------------------------------------------------------------------------+
| Name | Value Type | Description |
|------------------+------------+----------------------------------------|
| "urgency" | byte | The urgency level. |
|------------------+------------+----------------------------------------|
| "category" | string | The type of notification this is. |
|------------------+------------+----------------------------------------|
| | | This specifies the name of the |
| | | desktop filename representing the |
| | | calling program. This should be the |
| | | same as the prefix used for the |
| "desktop-entry"> | string | application's .desktop file. An |
| | | example would be "rhythmbox" from |
| | | "rhythmbox.desktop". This can be used |
| | | by the daemon to retrieve the correct |
| | | icon for the application, for logging |
| | | purposes, etc. |
|------------------+------------+----------------------------------------|
| | | This is a raw data image format |
| | | which describes the width, height, |
| "image_data" | (iiibiiay) | rowstride, has alpha, bits per sample, |
| | | channels and image data respectively. |
| | | We use this value if the icon field is |
| | | left blank. |
|------------------+------------+----------------------------------------|
| "sound-file" | string | The path to a sound file to play |
| | | when the notification pops up. |
|------------------+------------+----------------------------------------|
| | | Causes the server to suppress |
| | | playing any sounds, if it has that |
| "suppress-sound" | boolean | ability. This is usually set when the |
| | | client itself is going to play its own |
| | | sound. |
|------------------+------------+----------------------------------------|
| | | Specifies the X location on the |
| "x" | int | screen that the notification should |
| | | point to. The "y" hint must also be |
| | | specified. |
|------------------+------------+----------------------------------------|
| | | Specifies the Y location on the |
| "y" | int | screen that the notification should |
| | | point to. The "x" hint must also be |
| | | specified. |
+------------------------------------------------------------------------+