Linux, Operating System
Re-build Volume Control Panel on Desktop Panel in Ubuntu
Sometimes after Upgrade your Ubuntu System, Volume Control Panel will be lost.
Although you can configure your System Volume in System > Preferences > Sound Preferences,
it is a tedious method that only increase, decrease or mute the volume.
So, restore the shortcut control is a better method.
It is an easy way to restore it.
Open Terminal and type
to restore it