gnome-shell 使用 notify-send 发送桌面消息

什么是notify-send?

     notify-send - a program to send desktop notifications

怎么使用？

NAME

       notify-send - a program to send desktop notifications

SYNOPSIS

       notify-send [OPTIONS] <summary> [body]

DESCRIPTION

       With notify-send you can sends desktop notifications to the user via a notification daemon
       from the command line.  These notifications can be used to inform the user about an  event
       or display some form of information without getting in the user's way.

OPTIONS

       -u, --urgency=LEVEL Specifies the urgency level (low, normal, critical).

       -t, --expire-time=TIME
              The duration, in milliseconds, for the notification to appear on screen.  (Ubuntu's
              Notify OSD and GNOME Shell both ignore this parameter.)

       -i, --icon=ICON[,ICON...]
              Specifies an icon filename or stock icon to display.

       -c, --category=TYPE[,TYPE...]
              Specifies the notification category.

          Help options:

       -?, --help
              Show this help message

       -h, --hint=TYPE:NAME:VALUE
              Specifies basic extra data to pass. Valid types are int, double, string and byte.

       SEE ALSO
              The Desktop Notification Spec on http://www.galago-project.org/specs/notification/.

AUTHOR

       This manual page was written by Andre Filipe de Assuncao e  Brito  <decko@noisemakers.org>
       and  Paul  van Tilburg <paulvt@debian.org> and Riccardo Setti <giskard@debian.org> for the
       Debian project (but may be used by others).
在 gnome-shell 中 使用 notify-send --help 命令来进行显示使用说明：

➜  Downloads notify-send --help
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.
  -a, --app-name=APP_NAME           Specifies the app name for the icon
  -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.

　　之后我们将结合crontab等命令, 来进行定时发送消息，进行桌面和邮件通知。