If you Have installed a Launcher e.g. Unity Launcher on Your Device, you can easily back to ubuntu classic Desktop instead of new launcher that previously installed. This is one of best answer i founded in askubuntu.com.
Log in with the classic GNOME session by selecting your username and then selecting Ubuntu Classic Desktop:
Right click the
Main Menuapplet (that is the one you want to have replaced) and selectRemove From Panel.Right click the
Indicator Applet Application Menuapplet and selectLock To Panelto unlock it.OPTIONAL: Remove it the same way you removed the
Main MenuappletRight click on the panel and select
Add to Panel...Select the
Menu Barapplet and hitAdd- Right click it and move it to the left
- Right click it again and select
Lock To Panel - WIN
Note on point three. It is optional. If you don't remove it you'll still have the Indicator Applet Application Menu applet displaying all the menus.
- If you want to permanently revert all the menus to the classic style you can also remove the
indicator-appmenupackage.
To permanently make the Classic Session be the default, run the Login Settings tool and select the classic desktop: