How to Restore Missing Volume Control Icon/Button in Ubuntu Linux

“How to Restore Missing Volume Control Icon/Button in Ubuntu
Linux: One of the most annoying bugs in the latest versions of
Ubuntu (versions 10.04 – 10.10) is the disappearing or missing
volume control applet from the system tray inside the GNOME panel.
This usually happen after a system update and there’s no easy
option to quickly add the volume control back to the tray so it is
kind of frustrating. As some of you may know, the volume control is
part of the “Indicator Applet” but simply adding the applet back to
the panel will not solve the issue.

“So how are you going to restore or put the volume control icon
back to the system tray inside the panel?”

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