How to execute sh script from a desktop shortcut?

1. /usr/share/applications/ depending upon your system) if you want the launcher shortcut to be available to all users.
   

   sudo -i gedit /usr/share/applications/name.desktop
   

   
   


2. Paste below text
   

   [Desktop Entry]
   Type=Application
   Terminal=true
   Name=unmount-mount
   Icon=/path/to/icon/icon.svg
   Exec=/path/to/file/mount-unmount.sh
   

   
   edit Icon= and Exec= and Name=
   
   Also Terminal=True/false determines whether the terminal opens a window and displays output or runs in the background


3. put this in unity panel by dragging it from files manager

logic is very simple that unity panel allows *.desktop files as launcher though I haven't tried it because I use Natty.