Backups do Root.disk

Backup the root.disk (not required, but a good idea)

3. Mount the NTFS partition that your root.disk is on (this example assumes it's /dev/sda1 and the mountpoint is /media/win - adjust accordingly in the following instructions):

sudo mkdir -p /media/win
sudo mount /dev/sda1 /media/win
4. Check the size of the root.disk (not required)

du -h --apparent-size /media/win/ubuntu/disks/root.disk
5. Run fsck on the root.disk

fsck -f /media/win/ubuntu/disks/root.disk
6. Resize - specify the desired final size (this example resizes to 10 GB)

resize2fs /media/win/ubuntu/disks/root.disk 10G
7. Reboot back into Wubi Ubuntu