or u can goto super user by typing sudo su or su . give the password n then type
"fdisk -l" this will list u the partitions. ( some thing like this . The * mark is the linux partition )
Disk /dev/sdb: 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: 0x2aeb3190
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 9605 77147136 83 Linux
/dev/sdb2 9605 19458 79140865 5 Extended
/dev/sdb5 9605 9666 487424 83 Linux
/dev/sdb6 9666 19458 78652416 83 Linux
Then Create a folder by typing
mkdir myfolder
then
/dev/sdb1(the partition which the linux is installed. u will have check urs n try it there )
mount /dev/sdb1 /media/myfloder