How-to expand disk space of virtual machine using GParted in VirtualBox?

Problem:

How-to expand disk space of virtual machine after increasing space in VirtualBox?

Solution:

To resize/expend your hard disk partitions in your VM. You need to use software like Gparted. (http://gparted.sourceforge.net/download.php).
You have to boot your VM with the GParted live CD and allocate the new space to the partition that you want.

Note: I am assuming you have increased the disk size using “VboxManage modifyhd” command