Hi, recently i downloaded the ubuntu 12.04 server and installed it on a hyper v VM. I allocated 20 GB for the virtual machine and started installtion, during the installtion it asked for amount of hardrive space to be allocated and i gave 50%, just thought later we could expand it, but now when i tried to see the disk space it only shows only the details of the allocated disk space but not the other 10 gb free space.
Here is the link to the screenshot
https://skydrive.live.com/?cid=E2BC3...E5C2D3D196!139.

Please suggest a way to increase the disk space by allocating the other 10 gb to the disk.

What is the output of

https://skydrive.live.com/#cid=E2BC3...E5C2D3D196!140

The fdisk -l displayed nothing
and df -h displayed some results similar to my previous post. Please click on the link above.

Is there a way i could attach the picture directly here itself?

You need to be root to use fdisk command I suppose. sudo fdisk -l should be the command. Anyways, it seems you have installed Ubuntu on LVM partition. Increasing LVM should not be too difficult. Just add the disk. Create partitions. Create physical volumes on partition. Then add those to the volume group and extend the logical volumes.