Upgrade VirtualBox Guest Additions 4.1.22 on Fuduntu

Upgrade VirtualBox Guest Additions 4.1.22 on Fuduntu

Since the new version of VirtualBox 4.1.22 is now available, I need to upgrade the Guest Additions installed on my Fuduntu 2012 virtual machine. Upgrade VirtualBox Guest Additions 4.1.22 on Fuduntu can be done quickly and this upgrade is performed to improved the overall system performance. 
To upgrade the guest additions on Fuduntu 2012, simply go to Devices | Install Guest Additions menu. Then, press run on the confirmation window to start the installation immediately. Provide the root password to continue. 
When finished, simply reboot the virtual machine and Fuduntu now running the latest Guest Additions on board.