I installed ubuntu server using LVM partitioning on a 1 TB hard disk. However, after installation, i can only see 10 Gig space here is the fidsk output

`
 # fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 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: 0x00041507

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          10       71680   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              10      121602   976689152   8e  Linux LVM

Disk /dev/dm-0: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 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: 0x00000000

Disk /dev/dm-0 doesn't contain a valid partition table

Disk /dev/dm-1: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 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: 0x00000000

Disk /dev/dm-1 doesn't contain a valid partition table
You have new mail in /var/mail/root

and df -h output 

df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/system-root
                      9.9G  6.6G  2.8G  71% /
devtmpfs              1.9G  232K  1.9G   1% /dev
tmpfs                 1.9G  4.0K  1.9G   1% /dev/shm
/dev/sda1              68M   22M   43M  34% /boot
tmpfs                 6.0G     0  6.0G   0% /var/spool/asterisk/monitor
You have new mail in /var/mail/root

`

any way to increase this space without reisntalling?