Ubuntu – Ubuntu 14.04 top taskbar missing

Like, Chih Ho mentioned this is a bug. I'd like to offer a work-arounds here. It may be useful for others in future as well, and I had a lot of fun while pondering this question, so might as well post this "solution".

So, you know how you can shutdown computer through bash, right? Well, it's also possible to log-out of the GUI through bash by entering gnome-session-quit (and don't worry about the whole gnome-session thing, it works regardless). What if you could make a script that brings up a terminal window and asks you to choose log-out or quit ? Well, here it is.

Before we even begin writing the script, open the file manager, go to Edit drop-down menu -> preferences -> Behavior, and check "Run executable text files when they are opened." That will actually let you run a script from the Desktop.

Now for the script itself. Open the terminal (Ctrl+Alt+T), and type nano ~/Desktop/Logout_Script.sh . In this case I'm using nano text editor to create Logout_Script.sh on desktop, but that's a formality - you can choose whatever text editor you like.

Here's the body of the script itself:

#!/bin/bash
xterm -hold -e " echo  'Enter your password to shutdown, Ctrl+C to logout instead'; sudo shutdown -P +10 || gnome-session-quit --logout  "

Let's see what is actually going on here. xterm -hold -e " " will open xterm window and hold it, and execute whatever set of command you place in between the quotation marks. In this case it will open xterm window and hold it, and echo a prompt for you to enter password to shutdown, or if you want to cancel to press Ctrl+C. What comes next is the actual shutdown command, which will ask you for password. The logical or (||) will evaluate if shutdown exits successfully or not. If you press Ctr+C at this stage, this will cancel shutdown, and execute next command , which is gnome-session-quit. That in turn, should bring up a transparent log-out prompt. Once you done writing, remember to modify the permissions of the script, so you can actually execute it. That is,

sudo chmod 755 ~/Destop/Logout_Script.sh

So here's the xterm window that pops-up when I hit enter on the script(excuse the bright colors):

Note, I mentioned that xterm -hold -e will hold xterm window until closed. That is, it will hold until you graphically close it, by pressing on the red x in the upper right corner, but if you plan to log out or shut down it won't be necessary, so we can ignore that. But what if you opened window, entered password, the system went for shutdown, and then half way you decided to cancel it? Then the window would hang around, and you would have to kill it graphically. Why? Because shutdown command exited sucessfully, so logical or would not execute gnome-session-quit part of the script. Also, in the script I wrote sudo shutdown -P +10, which will shutdown computer within 10 minutes, but if you want immediate shutdown, you may want to write now instead of +10 .

And one more thing: pay attention to the sequence of -hold and -e. If you place -e first, it will give you error, so to actually hold the window -hold has to be first.

Why write such script? Just to substitute for the missing indicator, I guess. Certainly, on laptops (not sure about desktops) there's power-button what actually gives you the transparent menu with logout-shutdown-suspend choices, but this way it's more fun.

Hope this helps to you or anybody else. If anybody wants to improve this script, please do so, just let me know what you changed - I wanna learn ,too :)

Some sources:

• Logging out
• Calling xterm to run commands

Ctrl + Alt + t will give you a terminal. Once you have terminal enter sudo synaptic You will be asked for your password. Enter it. The curser will not move. Hit enter. This should start the Synaptic Package Manager. Search for LXPanel and then mark lxpanel for re-installation. Hit apply. Hope that helps.