How to add Shutdown button to LXPanel and make it work?

Question

I cannot seem to be able to add a shutdown button to my LXPanel. In /usr/share/applications there is a Shutdown (lubuntu-logout.desktop) containing the line Exec=lubuntu-logout but it would not run.

It contains the following

[Desktop Entry]
Name=Shutdown
Comment=Shutdown or Reboot
Icon=system-shutdown-panel
Exec=lubuntu-logout
Path=
Terminal=false
StartupNotify=false
Categories=Utility;Settings;System;GTK
NoDisplay=false

In usr/bin there is a shell script called lubuntu-logout:

#!/bin/sh
lxsession-logout --banner "/usr/share/lubuntu/images/logout-banner.png" --side=top

Creating a desktop file that will contain the line Exec=lxsession-logout should also work. But it does not!

Trying to make it executable, trying to find permissions in pcmanfm - properties:

In Thunar I can find the settings to make it executable:

But then running it I get

How should I edit it to make it run and then visible in menus so to add it to the panel?

OR: What is the correct content of the shutdown.desktop file?

Answer 1

I created a file that works.

Used the line Exec=/usr/bin/lxsession-logout.

Called the file Shutdown-lubuntu.desktop with these lines:

[Desktop Entry]
Name=ShutdownLubuntu
Comment=Shutdown or Reboot
Icon=system-shutdown-panel
Exec=/usr/bin/lxsession-logout
Categories=GTK;System;Settings;
Type=Application

and put it in usr/share/applications. This made it appear in main menu under System Tools and could be added in lxpanel in an application launch bar.