hi guys...

My system is dual boot with win7 and ubuntu.
I have free space of around 10 gb.
I want to add this free space to my ubuntu drive.

How can i do that?

use gparted or qtparted to see how the partions are.
Post the same.

gparted or qtparted didn't work for me...i tried this

sudo fdisk -l

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x75c9ea72

Device Boot Start End Blocks Id System
/dev/sda1 * 1 5099 40957686 7 HPFS/NTFS
/dev/sda2 5100 14454 75137228 f W95 Ext'd (LBA)
/dev/sda5 5100 10198 40957686 7 HPFS/NTFS
/dev/sda6 10199 13846 29296640 83 Linux
/dev/sda7 13846 14454 4881408 82 Linux swap / Solaris

If you want to increase the size of your Ubuntu partition and not create another partition for it, use a GParted, Parted Magic or Linux CD. Do not use GParted from a running system as this can create problems. Your Extended partition does not go to the end of the drive.

Boot the CD, delete swap (sda7).
Resize the Extended partition (sda2) to the end of the disk.
Resize Ubuntu (sda6) by increasing it. Leave 1-2GB at the end and create a swap partition there.
This is one way of doing it.

Windows 7 comes with a tool which can decrease (or increaes) the partition (even drive c. I would recommend to use this as a first step and then use Ubuntu and create another Linuxparititon in the free space.

On Windows 7 go to: "Start"->"Computer"->"Administration"->"Volume Management" (I'm not really sure with the english menuentries, but you may look at "help and support").

Markus