Linux main menu bars (top and bottom) disappeared

Linux (Ubuntu) is generally great...and still I must admit that most often ones habits are stronger I launch Windows. There are however many points that speak for's free, you always stay up-to-date by automatically getting the latest updates. But then there are moments - as today - where you switch your notebook on, start Ubuntu and look menu bars (the top and bottom one of the operating system) pop up, Alt+F2 doesn't work etc...
If you're not a Linux specialist you might get into trouble. Fortunately I managed to launch Firefox and search the web for a solution and that's another positive point regarding Linux operating systems. Since it's open source, you'll find a huge amount of documentation and problems/solutions on forums etc..So I followed some indications and after about 10 min everything worked fine again, menu bars launched correctly.

So for everyone of you which reads this post because he actually encountered the same problem. Just follow the following steps:
  1. Hit Ctrl+Alt+F1 to switch to the console window. (Hint: you can switch around between different console windows by hitting Ctrl+Alt+, Ctrl+Alt+F7 will (usually) show you the graphical inteface with the desktop.
  2. Log in by using your username and password.
  3. Type the following command:

    sudo apt-get install ubuntu-desktop
  4. After that finished type

    sudo apt-get update
Then I switched back to the desktop mode (Ctrl+Alt+F7) and killed the session by hitting Ctrl+Alt+Backspace. I logged back in and everything worked again.



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