比如说，我有一个启动程序，想在桌面上面放一个图标，直接双击就可以打开。
在桌面建立文件 my_app.desktop，注意后缀名是 .desktop，然后如下的代码：
[Desktop Entry]
Encoding=UTF-8
Name=My APP
Comment=My APP is wonderful
Exec=/bin/sh "/home/davidhhuan/Software/myapp/bin/myapp"
Icon=/home/davidhhuan/Software/myapp/myapp.png
Categories=Application;Development;Java;IDE
Version=1.0
Type=Application
Terminal=0
Encoding=UTF-8
Name=My APP
Comment=My APP is wonderful
Exec=/bin/sh "/home/davidhhuan/Software/myapp/bin/myapp"
Icon=/home/davidhhuan/Software/myapp/myapp.png
Categories=Application;Development;Java;IDE
Version=1.0
Type=Application
Terminal=0
Have fun with Ubuntu!