I have installed Ubuntu from Windows 8 using windows installer on a small allocated space same partition as windows. Now I want to use ubuntu as my primary OS so want to allocate it more space. Can I do that without loosing windows or linux data?
Download this file Now from your terminal do following. For example we want to make it 20 GB then:
cd ~/Downloads/wubi-resize-1.6 sudo bash wubi-resize.sh 20